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1. "Click polyester": Synthesis of polyesters containing triazole units in the main chain via safe and rapid "click" chemistry and their properties

Author:
Nagao, Yu; Takasu, Akinori
Source:
Journal of polymer science 2010 v.48 no.19 pp. 4207-4218
ISSN:
0887-624X
Subject:
copper; microwave treatment; molecular weight; polyesters; polymerization; thermal properties; triazoles
Abstract:
... Click Cu(I)-catalyzed polymerizations of diynes that contained ester linkages and diazides were performed to produce polyesters (click polyesters) of large molecular weights [(~1.0-7.0) x 10⁴], that contained main-chain 1,4-disubstitued triazoles in excellent yields. Incorporation of triazole improved the thermal properties and magnified the even-odd effect of the methylene chain length. We also f ...
DOI:
10.1002/pola.24206

2. "Click" chemistry for in situ formation of thermoresponsive P(NIPAAm-co-HEMA)-based hydrogels

Author:
Xu, Xiao-Ding; Chen, Chang-Sheng; Wang, Zong-Chun; Wang, Gan-Rui; Cheng, Si-Xue; Zhang, Xian-Zheng; Zhuo, Ren-Xi
Source:
Journal of polymer science 2008 v.46 no.15 pp. 5263-5277
ISSN:
0887-624X
Subject:
alkynes; catalysts; copper; crosslinking; gelation; hydrocolloids; polymers; temperature
Abstract:
... The strategy for in situ chemical gelation of poly(N-isopropylacrylamide-co-hydroxylethyl methacrylate) [P(NIPAAm-co-HEMA)]-based polymers was demonstrated. Two types of new P(NIPAAm-co-HEMA) derivatives with alkyne and azide pendant groups, respectively, were prepared. When the solutions of the two derivatives were mixed together, a crosslinking reaction, a type of Huisgen's 1,3-dipolar azide-alk ...
DOI:
10.1002/pola.22857

3. "Living" radical polymerization of styrene catalyzed by cyclometalated ruthenium(II) complexes bearing nonlabile ligands

Author:
Aguilar-Lugo, C.; Le Lagadec, R.; Ryabov, Alexander D.; Valverde, G. Cedillo; Morales, S. Lopez; Alexandrova, L.
Source:
Journal of polymer science 2009 v.47 no.15 pp. 3814-3828
ISSN:
0887-624X
Subject:
aluminum; catalysts; catalytic activity; ligands; osmium; polymerization; polymers; redox potential; ruthenium; styrene
Abstract:
... Cationic substitutionally inert cyclometalated ruthenium (II) and osmium (II) complexes, ([Mt(o-C₆H₄-2-py)(LL)₂]PF₆), where LL-1,10-phenanthroline (phen) or 2,2'-bipyridine (bipy), were used for radical polymerization of styrene. Gradual modification of the complexes within the series allowed comparison of the catalytic activity and the redox properties. There was no correlation between the reduci ...
DOI:
10.1002/pola.23445

4. "Living"/controlled free radical polymerization of MMA in the presence of cobalt(II) 2-ethylhexanoate: A switch from RAFT to ATRP mechanism

Author:
Zhang, Zhengbiao; Zhang, Wei; Zhu, Xiulin; Cheng, Zhenping; Zhu, Jian
Source:
Journal of polymer science 2007 v.45 no.24 pp. 5722-5730
ISSN:
0887-624X
Subject:
molecular weight; polymerization; polymethylmethacrylate
Abstract:
... A metal complex, cobalt(II) 2-ethylhexanoate (CEH), was added to the system of thermal-initiated reversible addition-fragmentation chain transfer (RAFT) polymerization of methyl methacrylate (MMA) with 2-cyanoprop-2-yl 1-dithionaphthalate (CPDN) as the RAFT agent at 115 °C. The polymerization rate was remarkably enhanced in the presence of CEH in comparison with that in the absence of CEH, and the ...
DOI:
10.1002/pola.22320

5. "On-off" switching of dynamically controllable self-assembly formation of double-responsive block copolymers with tunable LCSTs

Author:
Kotsuchibashi, Youhei; Ebara, Mitsuhiro; Yamamoto, Kazuya; Aoyagi, Takao
Source:
Journal of polymer science 2010 v.48 no.20 pp. 4393-4399
ISSN:
0887-624X
Subject:
acrylamides; ambient temperature; aqueous solutions; composite polymers; drug delivery systems; drugs; fluorescence; heat; hydrophobicity; light scattering; micelles; nuclear magnetic resonance spectroscopy; polymerization; scanning electron microscopy
Abstract:
... We report here a reversible self-assembly formation system using block copolymers with thermo-tunable properties. A series of double-responsive block copolymers, poly(N-isopropylacrylamide (NIPAAm))-block-poly(NIPAAm-co-N-(isobutoxymethyl)acrylamide (BMAAm)) with two lower critical solution temperatures were synthesized by one-pot atom transfer radical polymerization via sequential monomer additio ...
DOI:
10.1002/pola.24226

6. "Push-pull" supramolecular chromophores supported on cyclopolymers

Author:
Coluccini, Carmine; Metrangolo, Pierangelo; Parachini, Marco; Pasini, Dario; Resnati, Giuseppe; Righetti, Pierpaolo
Source:
Journal of polymer science 2008 v.46 no.15 pp. 5202-5213
ISSN:
0887-624X
Subject:
ethers; ions; nuclear magnetic resonance spectroscopy; polymers; titration
Abstract:
... Well-defined macromolecules have been obtained through free-radical cyclopolymerization and cyclocopolymerization of difunctional and acrylic-like monomers, which contained "push-pull" supramolecular chromophores, able to form 1:1 complexes with Eu³⁺ ions in solution. The monomeric molecular modules are built around bismalonate crown ethers in a convergent fashion, in which one of the malonate moi ...
DOI:
10.1002/pola.22848

7. (2-Hydroxy isobutyric) acid containing poly(glycolic acid): Structure-properties relationship

Author:
Soccio, Michelina; Lotti, Nadia; Finelli, Lara; Gazzano, Massimo; Munari, Andrea
Source:
Journal of polymer science 2010 v.48 no.17 pp. 1901-1910
ISSN:
0887-6266
Subject:
X-ray diffraction; ambient temperature; composite polymers; crystal structure; crystallization; differential scanning calorimetry; equations; glycolic acid; melting; melting point; molecular weight; polyesters; thermal stability; thermogravimetry
Abstract:
... Poly(glycolic acid) (PGA) and a series of novel random copolymers of PGA containing 2-hydroxyisobutyrric acid (PGAPHIB) (HIB unit content from 1.5 to 7.4 mol %) were synthesized and characterized in terms of chemical structure and molecular weight. Afterward, the polyesters were examined by thermogravimetric analysis, differential scanning calorimetry, and X-ray diffraction techniques. The copolym ...
DOI:
10.1002/polb.22065

8. (Meth)acrylate-based photoelastomers as tailored biomaterials for artificial vascular grafts

Author:
Baudis, Stefan; Heller, Christian; Liska, Robert; Stampfl, Juergen; Bergmeister, Helga; Weigel, Guenter
Source:
Journal of polymer science 2009 v.47 no.10 pp. 2664-2676
ISSN:
0887-624X
Subject:
aorta; biocompatibility; biocompatible materials; cardiovascular diseases; cell structures; hydrocolloids; modulus of elasticity; morbidity; mortality; polyethylene terephthalates; tensile strength
Abstract:
... Cardiovascular disease is one of the leading causes of morbidity and mortality in the western hemisphere. Currently available synthetic vascular conduits, like Dacron or ePTFE show excellent long-term results for large-caliber arterial reconstruction (aorta, iliac vessels) but when used for small diameter (<4 mm) vessel reconstruction, patency rates are extremely poor. We therefore aim at developi ...
DOI:
10.1002/pola.23352

9. 1,2 Enriched polymerization of isoprene by cobalt complex carrying aminophosphory fused (PN3) ligand

Author:
Xiaoyu Jia; Xuequan Zhang; Dirong Gong
Source:
Journal of polymer science 2018 v.56 no.20 pp. 2286-2293
ISSN:
0887-624X
Subject:
catalysts; cobalt; differential scanning calorimetry; isomers; isoprene; ligands; magnesium; molecular weight; new family; nuclear magnetic resonance spectroscopy; polymerization; polymers; temperature
Abstract:
... Metal‐catalyzed selective isoprene polymerization has been a major entry toward cis‐1,4, trans‐1,4, and 3,4 isomers of polyisoprene, however, 1,2 selective polymerization of isoprene has not yet been achieved due to the steric problem. In this work, difluoro cobalt complexes carrying aminophosphory (‐HN‐P(=O) ᵗBu₂‐) fused pyrazol‐pyridine ligand has been prepared and characterized. In combination ...
DOI:
10.1002/pola.29201

10. 1,4-Dilithio-1,1,4,4-tetraphenylbutane in diethyl ether: An effective initiator for the living anionic polymerization of dienes

Author:
Dimitrov, Philip; Iyer, Pradeep; Van Beylen, Marcel; Hogen-Esch, Thieo E.
Source:
Journal of polymer science 2009 v.47 no.8 pp. 2198-2206
ISSN:
0887-624X
Subject:
composite polymers; ethyl ether; molecular weight; polymerization; temperature
Abstract:
... The anionic polymerization of butadiene initiated with 1,4-dilithio-1,1,4,4-tetraphenylbutane (LiTPB) in diethyl ether (DEE) gives polybutadiene (PBD) with high 1,2 content (>70%), narrow polydispersities (1.04 < Mw/Mn < 1.20), and predicted molecular weights. In THF, this polymerization does not work very well. After removal of DEE and addition of THF, the PBD dianion is end capped quantitatively ...
DOI:
10.1002/pola.23316

11. 1‐(2,6‐dibenzhydryl‐4‐fluorophenylimino)‐2‐aryliminoacenaphthylylnickel halides highly polymerizing ethylene for the polyethylenes with high branches and molecular weights

Author:
Linlin Fan; Shizhen Du; Cun‐Yue Guo; Xiang Hao; Wen‐Hua Sun
Source:
Journal of polymer science 2015 v.53 no.11 pp. 1369-1378
ISSN:
0887-624X
Subject:
X-ray diffraction; bromine; chemical structure; ethylene; halides; molecular weight; nickel; polyethylene; polymerization
Abstract:
... A series of 1‐(2,6‐dibenzhydryl‐4‐fluorophenylimino)‐ 2‐aryliminoacenaphthylene derivatives (L1–L5) and their halonickel complexes LNiX₂(X = Br, Ni1–Ni5; X = Cl, Ni6–Ni10) are synthesized and well characterized. The molecular structures of representative complexes Ni2 and Ni4 are confirmed as the distorted tetrahedron geometry around nickel atom by the single crystal X‐ray diffraction. Upon activa ...
DOI:
10.1002/pola.27572

12. 2,1,3‐benzothiadiazole‐5,6‐dicarboxylicimide based semicrystalline polymers for photovoltaic cells

Author:
Dat Thanh Truong Nguyen; Taehyo Kim; Yuxiang Li; Seyeong Song; Thanh Luan Nguyen; Mohammad Afsar Uddin; Sungu Hwang; Jin Young Kim; Han Young Woo
Source:
Journal of polymer science 2016 v.54 no.24 pp. 3826-3834
ISSN:
0887-624X
Subject:
X-radiation; absorption; chemical structure; fullerene; mixing; photovoltaic cells; polymers
Abstract:
... Two semicrystalline low band gap polymers based on highly electron‐deficient 2,1,3‐benzothiadiazole‐5,6‐dicarboxylicimide (BTI) were synthesized by considering the chain planarity via intrachain noncovalent coulombic interactions. The thiophene‐BTI and thienothiophene‐BTI based PPDTBTI and PPDTTBTI have a low band gap (∼1.5 eV) via strong intramolecular charge transfer interaction, showing a broad ...
DOI:
10.1002/pola.28279

13. 2,2,2‐trifluoroacetophenone‐based D‐π‐A type photoinitiators for radical and cationic photopolymerizations under near‐UV and visible LEDs

Author:
Ming Jin; Man Yu; Yuan Zhang; Decheng Wan; Hongting Pu
Source:
Journal of polymer science 2016 v.54 no.13 pp. 1945-1954
ISSN:
0887-624X
Subject:
absorption; acrylates; epoxides; fluorescence; free radicals; hydrogen; light intensity; photolysis; polymerization; polymers
Abstract:
... Two D‐π‐A‐type 2,2,2‐trifluoroacetophenone derivatives, namely, 4′‐(4‐(N,N‐diphenyl)amino‐phenyl)‐phenyl‐2,2,2‐trifluoroacetophenone (PI‐Ben) and 4′‐(4‐(7‐(N,N‐diphenylamino)‐9,9‐dimethyl‐9H‐fluoren‐2‐yl)‐phenyl‐2,2,2‐trifluoroacetophenone (PI‐Flu), are developed as high‐performance photoinitiators combined with an amine or an iodonium salt for both the free‐radical polymerization of acrylates and ...
DOI:
10.1002/pola.28053

14. 2,6‐Diaminopyridine and Acrylamide‐Based Copolymers with Upper Critical Solution Temperature‐type Behavior in Aqueous Solution

Author:
Asad Asadujjaman; Vahid Ahmadi; Antoine Michel Claude Franc; Annabelle Bertin
Source:
Journal of polymer science 2019 v.57 no.19 pp. 2064-2073
ISSN:
0887-624X
Subject:
acrylamides; aqueous solutions; composite polymers; deuterium; deuterium oxide; drugs; electrolytes; isotopes; light scattering; microfluidic technology; phase transition; polymerization; solvents; temperature; turbidimetry; water solubility
Abstract:
... A novel copolymer based on supramolecular motif 2,6‐diaminopyridine and water‐soluble acrylamide, poly[N‐(6‐acetamidopyridin‐2‐yl) acrylamide‐co‐acrylamide], was synthesized via reversible addition–fragmentation chain transfer (RAFT) polymerization with various monomer compositions. The thermoresponsive behavior of the copolymers was studied by turbidimetry and dynamic light scattering (DLS). The ...
DOI:
10.1002/pola.29474

15. 2-[(Diphenylphosphino)methyl]pyridine as ligand for iron-based atom transfer radical polymerization

Author:
Xue, Zhigang; Noh, Seok Kyun; Lyoo, Won Seok
Source:
Journal of polymer science 2008 v.46 no.9 pp. 2922-2935
ISSN:
0887-624X
Subject:
activation energy; bromine; chlorine; iron; molecular weight; polymerization; polymers; pyridines; solvents; styrene; temperature; toluene; weight control
Abstract:
... 2-[(Diphenylphosphino)methyl]pyridine (DPPMP) was successfully used as a bidentate ligand in the iron-mediated atom transfer radical polymerization (ATRP) of methyl methacrylate (MMA) with various initiators and solvents. The effect of the catalytic system on ATRP was studied systematically. Most of the polymerizations with DPPMP ligand were well controlled with a linear increase in the number-ave ...
DOI:
10.1002/pola.22625

16. 2D- and 3D-microstructured biodegradable polyester resins

Author:
Vaida, Cristian; Mela, Petra; Keul, Helmut; Möller, Martin
Source:
Journal of polymer science 2008 v.46 no.20 pp. 6789-6800
ISSN:
0887-624X
Subject:
aluminum; biodegradability; catalysts; composite polymers; crosslinking; esters; medical equipment; oxidation; polyesters; polymerization; resins
Abstract:
... Biodegradable polyester resins were prepared via photo crosslinking of functional polyesters obtained by copolymerization of ε-caprolactone and the functional cyclic esters γ-acryloyloxy-ε-caprolactone (ACL) and γ-methacryloyloxy-ε-caprolactone (MCL). The cyclic esters were prepared via Baeyer-Villiger oxidation of the corresponding 4-acyloyloxy-cyclohexanone derivatives. Copolymers with different ...
DOI:
10.1002/pola.22987

17. 3-Phenylethynyl phthalimide end-capped imide oligomers and the cured polymers

Author:
Liu, Yanfeng; Wang, Zhen; Yang, Huili; Gao, Lianxun; Li, Gao; Ding, Mengxian
Source:
Journal of polymer science 2008 v.46 no.12 pp. 4227-4235
ISSN:
0887-624X
Subject:
X-ray diffraction; differential scanning calorimetry; isomers; mechanical properties; molecular models; molecular weight; oxidative stability; phthalic anhydride; phthalimide; polymers; temperature; thermogravimetry; viscosity
Abstract:
... In the past decades, 4-phenylethynyl phthalic anhydride (4-PEPA) has been the most important endcapper used for thermoset polyimide. As the isomer of4-PEPA, 3-phenylethynyl phthalic anhydride (3-PEPA) has attracted our interest. In this article, 3-PEPA was synthesized and a comparative study with 4-PEPA on curing temperature, curing rate, thermal and mechanical properties of oligomers and cured po ...
DOI:
10.1002/pola.22687

18. 3D Mass diffusion in ordered nanocomposite systems: Finite element simulation and phenomenological modeling

Author:
Sarra Zid; Matthieu Zinet; Eliane Espuche
Source:
Journal of polymer science 2019 v.57 no.1 pp. 51-61
ISSN:
0887-6266
Subject:
energy; equations; finite element analysis; models; nanocomposites; packaging; polymers
Abstract:
... The optimization of polymer barrier properties is currently of crucial importance for a wide range of applications from packaging to building or even energy applications. To meet the requirements of these applications, polymer matrices are often combined with impermeable (nano) fillers. Different nanofiller natures, shapes, and contents have been experimentally used and a large range of barrier ma ...
DOI:
10.1002/polb.24758

19. 3D diamond-containing nanocomposites based on hybrid polyurethane-poly(2-hydroxyethyl methacrylate) semi-IPNs: Composition-nanostructure-segmental dynamics-elastic properties relationships

Author:
Karabanova, L.V.; Bershtein, V.A.; Sukhanova, T.E.; Yakushev, P.N.; Egorova, L.M.; Lutsyk, E.D.; Svyatyna, A.V.; Vylegzhanina, M.E.
Source:
Journal of polymer science 2008 v.46 no.16 pp. 1696-1712
ISSN:
0887-6266
Subject:
additives; atomic force microscopy; crosslinking; glass; glass transition; modulus of elasticity; nanocomposites; nanodiamonds; polymers; spectroscopy; synergism; temperature
Abstract:
... Nanostructure, glass transition dynamics and elastic properties were studied in the 3D nanodiamond-containing composites based on polyurethane-poly(2-hydroxyethyl methacrylate) semi-interpenetrating polymer networks (PU-PHEMA semi-IPNs), neat PU or PHEMA matrices. Nanodiamond (ND) content in the nanocomposites varied from 0.25 to 3 wt %. Combined differential scanning calorimetry/ laser-interferom ...
DOI:
10.1002/polb.21506

20. 3D printing of conjugated polymers

Author:
Robert S. Jordan; Yue Wang
Source:
Journal of polymer science 2019 v.57 no.23 pp. 1592-1605
ISSN:
0887-6266
Subject:
electronics; environmental sustainability; manufacturing; photochemical reactions; polymerization; polymers; three-dimensional printing
Abstract:
... Three‐dimensional (3D) printing brings exciting prospects to the realm of conjugated polymers (CPs) and organic electronics through vastly enhanced design flexibility, structural complexity, and environmental sustainability. However, the use of 3D printing for CPs is still in its infancy and remains full of challenges. In this review, we highlight recent studies that demonstrate proof‐of‐concept s ...
DOI:
10.1002/polb.24893

21. 3D‐morphology reconstruction of nanoscale phase‐separation in polymer memory blends

Author:
Vsevolod Khikhlovskyi; Albert J. J. M. van Breemen; Jasper J. Michels; René A. J. Janssen; Gerwin H. Gelinck; Martijn Kemerink
Source:
Journal of polymer science 2015 v.53 no.17 pp. 1231-1237
ISSN:
0887-6266
Subject:
electrical properties; electrodes; memory; mixing; polymers; semiconductors; statistical analysis
Abstract:
... In many organic electronic devices functionality is achieved by blending two or more materials, typically polymers or molecules, with distinctly different optical or electrical properties in a single film. The local scale morphology of such blends is vital for the device performance. Here, a simple approach to study the full 3D morphology of phase‐separated blends, taking advantage of the possibil ...
DOI:
10.1002/polb.23769

22. 4D Printing based piezoelectric composite for medical applications

Author:
Daniel Grinberg; Sabrina Siddique; Minh‐Quyen Le; Richard Liang; Jean‐Fabien Capsal; Pierre‐Jean Cottinet
Source:
Journal of polymer science 2019 v.57 no.2 pp. 109-115
ISSN:
0887-6266
Subject:
education; engineering; health services; manufacturing; medicine; polymers
Abstract:
... Additive manufacturing (AM), otherwise known as three‐dimensional (3D) printing, is driving major innovations in many areas, such as engineering, manufacturing, art, education, and medicine. Although a considerable amount of progress has been made in this field, additional research work is required to overcome various remaining challenges. Recently, one of the actively researched areas lies in the ...
DOI:
10.1002/polb.24763

23. 4H‐cyclopenta[2,1‐b:3,4‐b′]dithiophen‐4‐one (CPDTO) homopolymer with side chains on every other CPDTO

Author:
Jianyuan Sun; Swaminathan Venkatesan; Ashish Dubey; Qiquan Qiao; Cheng Zhang
Source:
Journal of polymer science 2017 v.55 no.6 pp. 1077-1085
ISSN:
0887-624X
Subject:
X-ray diffraction; chloroform; nuclear magnetic resonance spectroscopy; photovoltaic cells; polymers; separation; thermal analysis; ultraviolet-visible spectroscopy
Abstract:
... A soluble 4H‐cyclopenta[2,1‐b;3,4‐b′]dithiophene‐4‐one (CPDTO)‐based polymer (C₆‐PCPDTO) has been synthesized from two monomers derived from nonalkylated CPDTO and didodecyl CPDTO (C₁₂‐CPDTO). Proton NMR, thermal analysis, UV–vis absorption, cyclic voltammetry, and XRD are used to characterize the polymer in solution and film. The new polymer has an optical bandgap of 1.28 eV in film, and has stro ...
DOI:
10.1002/pola.28472

24. 4‐hydroxythiophenol grafted PS‐b‐PAA block copolymers: Preparation and formation of porous and bowl‐shaped assemblies

Author:
Wenting Li; Na Li; Jiaxu Zhao; Xiaokai Zhang; Xue Li
Source:
Journal of polymer science 2016 v.54 no.16 pp. 1551-1557
ISSN:
0887-6266
Subject:
aqueous solutions; composite polymers; esterification
Abstract:
... 4‐Hydroxythiophenol (HTP) grafted poly(styrene‐b‐acrylic acid) (PS‐b‐PAA) block copolymers (BCPs) (PS‐b‐PAA‐g‐HTP) was synthesized using the esterification reaction between the carboxyl groups and hydroxyl groups. Self‐assembly behavior of the graft copolymer in 1,4‐dioxane/water was investigated. Assemblies of different morphologies, porous, and bowl‐shaped structures, could be easily prepared. A ...
DOI:
10.1002/polb.24067

25. 9,9′-spirobifluorene-containing polycarbonates: Transparent polymers with high refractive index and low birefringence

Author:
Seto, Ryota; Sato, Takashi; Kojima, Takahiro; Hosokawa, Katsumoto; Koyama, Yasuhito; Konishi, Gen-Ichi; Takata, Toshikazu
Source:
Journal of polymer science 2010 v.48 no.16 pp. 3658-3667
ISSN:
0887-624X
Subject:
air; benzene; chloroform; differential scanning calorimetry; glass transition temperature; nitrogen; polymers; refractive index; solubility; solvents; thermal stability; weight loss
Abstract:
... Syntheses of 2,2′-bisalcoholic group-substituted 9,9′-spirobifluorene monomers 2 were performed by the reaction of 2,2′-dihydroxy-9,9′-spirobifluorene 2a with haloalcohols. Polycarbonates consisting of 9,9′-spirobifluorene skeleton in the main chain (PC 4) were synthesized by the polycondensation of 2,2′-bisalcoholic monomers 2 and triphosgene or diphenyl carbonate. PC 4 showed good thermal stabil ...
DOI:
10.1002/pola.24150

26. 9-Bromoanthracene photodimers as initiators in controlled radical polymerization: Silane radical atom abstraction coupled with nitroxide mediated polymerization

Author:
Thakur, Sona; Smith, Jenell R.; Tillman, Eric S.; Cohen, Nicole A.; Contrella, Nathan D.
Source:
Journal of polymer science 2008 v.46 no.18 pp. 6016-6022
ISSN:
0887-624X
Subject:
anthracenes; free radicals; molecular weight; polymerization; polymers; spectroscopy; thermal degradation
Abstract:
... Slow initiation relative to propagation has previously prevented photodimers of 9-bromoanthracene or 9-chloroanthracene, formed by [4 + 4] photocyclization reactions of the analogous 9-haloanthracene, from being viable initiators in atom transfer radical polymerization (ATRP) reactions. The resulting polymers were found to possess high polydispersity index (PDI) values, much higher than expected n ...
DOI:
10.1002/pola.22903

27. A "click" approach to ROMP block copolymers

Author:
Hilf, Stefan; Hanik, Nils; Kilbinger, Andreas F.M.
Source:
Journal of polymer science 2008 v.46 no.9 pp. 2913-2921
ISSN:
0887-624X
Subject:
composite polymers; polyethylene glycol; polymerization; ruthenium
Abstract:
... Amphiphilic block copolymers can be conveniently prepared via convergent syntheses, allowing each individual polymer block to be prepared via the polymerization technique that gives the best architectural control. The convergent "click-chemistry" route presented here, gives access to amphiphilic diblock copolymers prepared from a ring opening metathesis polymer and polyethylene glycol. Because of ...
DOI:
10.1002/pola.22622

28. A "plug and play" polymer through biocomplementary hydrogen bonding

Author:
Cheng, Chih-Chia; Huang, Chih-Feng; Yen, Ying-Chieh; Chang, Feng-Chih
Source:
Journal of polymer science 2008 v.46 no.19 pp. 6416-6424
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; X-radiation; X-ray diffraction; adenine; alkylation; chemical structure; differential scanning calorimetry; dimethyl sulfoxide; hydrogen bonding; light scattering; nuclear magnetic resonance spectroscopy; polymerization; polymers; thymine; titration
Abstract:
... This article describes a DNA-like polymer that exhibits the ability to self-assemble through hydrogen bonding. We synthesized poly[1-(4-vinylbenzyl)thymine] (PVBT) and 9-hexadecyladenine (A-C16) through an atom transfer radical polymerization (ATRP) and alkylation, respectively. Biocomplementary PVBT/A-C16 hierarchical supramolecular complexes formed in dilute DMSO solution through nucleobase reco ...
DOI:
10.1002/pola.22949

29. A Critical Survey of Dithiocarbamate Reversible Addition‐Fragmentation Chain Transfer (RAFT) Agents in Radical Polymerization

Author:
Graeme Moad
Source:
Journal of polymer science 2019 v.57 no.3 pp. 216-227
ISSN:
0887-624X
Subject:
acrylates; esters; nitrogen; polymerization; polymers; surveys
Abstract:
... This article provides a critical review of the properties, synthesis, and applications of dithiocarbamates Z′Z″NC(=S)SR as mediators in reversible addition‐fragmentation chain transfer (RAFT) polymerization. These are among the most versatile RAFT agents. Through choice of substituents on nitrogen (Z′, Z″), the polymerization of most monomer types can be controlled to provide living characteristic ...
DOI:
10.1002/pola.29199

30. A Diels-Alder/retro Diels-Alder strategy to synthesize polymers bearing maleimide side chains

Author:
Dispinar, Tugba; Sanyal, Rana; Sanyal, Amitav
Source:
Journal of polymer science 2007 v.45 no.20 pp. 4545-4551
ISSN:
0887-624X
Subject:
composite polymers; differential scanning calorimetry; nuclear magnetic resonance spectroscopy; polymerization; stable isotopes
Abstract:
... Polymers containing thiol-reactive maleimide groups on their side chains have been synthesized by utilization of a novel methacrylate monomer containing a masked maleimide. Diels-Alder reaction between furan and maleimide was adapted for the protection of the reactive maleimide double bond prior to polymerization. AIBN initiated free radical polymerization was utilized for synthesis of copolymers ...
DOI:
10.1002/pola.22299

31. A Free‐standing electrochromic material of poly(5,7‐bis(2‐(3,4‐ethylenedioxy)thienyl)‐indole) and its application in electrochromic device

Author:
Xiaoyan Yang; Changlong Liu; Jiabao Guo; Ling Wang; Guangming Nie
Source:
Journal of polymer science 2017 v.55 no.14 pp. 2356-2364
ISSN:
0887-624X
Subject:
color; electrochemistry; memory; nuclear magnetic resonance spectroscopy; polymers; scanning electron microscopy; thiophene
Abstract:
... Free‐standing poly(5,7‐bis(2‐(3,4‐ethylenedioxy)thienyl)‐indole) (PETI) was electrochemically obtained from 5,7‐bis(2‐(3,4‐ethylenedioxy)thienyl)‐indole (ETI) prepared by Stille coupling reaction of 5,7‐dibromoindole and 3,4‐ethylenedioxythiophene. For comparison, poly(5,7‐bis(2‐thiophene)‐indole) was also electrosynthesized from 5,7‐bis(2‐thiophene)‐indole (BTI) which was prepared from the 5,7‐di ...
DOI:
10.1002/pola.28624

32. A Monte Carlo study of the coil-to-globule transition of model polymer chains near an attractive surface

Author:
Rissanou, Anastassia N.; Anastasiadis, Spiros H.; Bitsanis, Ioannis A.
Source:
Journal of polymer science 2009 v.47 no.24 pp. 2462-2476
ISSN:
0887-6266
Subject:
Monte Carlo method; adsorption; energy; entropy; polymers; solubility
Abstract:
... When a polymer chain in solution interacts with an atomically smooth solid substrate, its conformational properties are strongly modified and deviate substantially from those of chains in bulk. In this work, the interplay of two competing transitions that affect the conformations of polymer chains near an energetically attractive surface is studied by means of Monte Carlo simulations on a cubic la ...
DOI:
10.1002/polb.21869

33. A New Approach for the Synthesis of Miktoarm Star Polymers Through a Combination of Thiol–Epoxy “Click” Chemistry and ATRP/Ring‐Opening Polymerization Techniques

Author:
Ikhlas Gadwal; Prakash P. Wadgaonkar; Amol B. Ichake; Shivshankar R. Mane
Source:
Journal of polymer science 2019 v.57 no.2 pp. 146-156
ISSN:
0887-624X
Subject:
aqueous solutions; esterification; ethane; hydrophilicity; moieties; organobromine compounds; polyethylene glycol; polymerization; temperature; thiols; transmission electron microscopy
Abstract:
... A new approach was developed for synthesis of certain A₃B₃‐type of double hydrophilic or amphiphilic miktoarm star polymers using a combination of “grafting onto” and “grafting from” methods. To achieve the synthesis of desired miktoarm star polymers, acetyl protected poly(ethylene glycol) (PEG) thiols (Mₙ = 550 and 2000 g mol⁻¹) were utilized to generate A₃‐type of homoarm star polymers through a ...
DOI:
10.1002/pola.29278

34. A New D–A conjugated polymer P(PTQD‐BDT) with PTQD acceptor and BDT donor units for BHJ polymer solar cells application

Author:
M. L. Keshtov; S. A. Kuklin; F. C. Chen; A. R. Khokhlov; Rajnish Kurchania; G. D. Sharma
Source:
Journal of polymer science 2015 v.53 no.20 pp. 2390-2398
ISSN:
0887-624X
Subject:
absorption; chloroform; composite polymers; dissociation; photovoltaic cells; solvents
Abstract:
... A novel donor–acceptor (D–A) copolymer comprising of weak electron donating BDT moiety and strong 9‐(2‐octyldodecyl)−8H‐pyrrolo[3,4‐b] bisthieno[2,3‐f:3',2'‐h] quinoxaline‐8,10(9H)‐dione (PTQD) unit denoted as P(PTQD‐BDT) was synthesized as donor material for polymer solar cells. P(PTQD‐BDT) shows a broad visible‐near‐infrared absorption band with an optical bandgap of 1.74 eV and possesses a rela ...
DOI:
10.1002/pola.27699

35. A SAXS and swelling study of cured natural rubber/styrene-butadiene rubber blends

Author:
Salgueiro, W.; Somoza, A.; Marzocca, A.J.; Torriani, I.; Mansilla, M.A.
Source:
Journal of polymer science 2009 v.47 no.23 pp. 2320-2327
ISSN:
0887-6266
Subject:
X-radiation; crosslinking; molecular weight; polymers; rheometers; rubber; temperature; torque
Abstract:
... A small-angle X-ray scattering (SAXS) and swelling study of natural rubber and styrene-butadiene rubber blends (NR/SBR) is presented. To this aim, specimens of NR and SBR and blends with 75/25, 50/50, and 25/75 NR/SBR ratios (in phr) were prepared at a cure temperature of 433 K and the optimum cure time (t₁₀₀). This time was obtained from rheometer torque curves. The system of cure used in the sam ...
DOI:
10.1002/polb.21828

36. A Sequential Debonding Fracture Model for Hydrogen‐Bonded Hydrogels

Author:
Hai Xin; Farshad Oveissi; Sina Naficy; Geoffrey M. Spinks
Source:
Journal of polymer science 2018 v.56 no.19 pp. 1287-1293
ISSN:
0887-6266
Subject:
cleavage (chemistry); crosslinking; deformation; dissociation; energy; hydrogels; hydrogen bonding; hydrophilicity; models; polyurethanes; urea
Abstract:
... Hydrogen bonds are known to play an important role in prescribing the mechanical performance of certain hydrogels such as polyether‐based polyurethanes. The quantitative contribution of hydrogen bonds to the toughness of polymer networks, however, has not been elucidated to date. Here, a new physical model is developed to predict the threshold fracture energies of hydrogels physically crosslinked ...
DOI:
10.1002/polb.24718

37. A benign initiating system for cationic polymerization of isobutyl vinyl ether: Silver salt/aryl(alkyl) halide/lewis base

Author:
Li Lin; Guangyou Zhang; Koichi Kodama; Mikio Yasutake; Takuji Hirose
Source:
Journal of polymer science 2015 v.53 no.17 pp. 2050-2058
ISSN:
0887-624X
Subject:
cations; dimethyl sulfide; ethyl ether; halides; polymerization; polymers; solvents
Abstract:
... Aryl(alkyl) halides and silver salts were studied as environmentally benign initiating systems for cationic polymerization of isobutyl vinyl ether (IBVE). The reactivity of the benzyl cations could be effectively controlled by using dimethyl sulfide (Me₂S) as an additive, which was shown to be an effective Lewis base (LB), and diethyl ether as a reaction solvent. Detailed study of various benzyl c ...
DOI:
10.1002/pola.27656

38. A benzophenone‐naphthalimide derivative as versatile photoinitiator of polymerization under near UV and visible lights

Author:
Jing Zhang; Nicolas Zivic; Frédéric Dumur; Pu Xiao; Bernadette Graff; Didier Gigmes; Jean Pierre Fouassier; Jacques Lalevée
Source:
Journal of polymer science 2015 v.53 no.3 pp. 445-451
ISSN:
0887-624X
Subject:
acrylates; electron paramagnetic resonance spectroscopy; epoxides; fluorescence; free radicals; hydrogen; photolysis; polymerization; polymers
Abstract:
... A benzophenone‐naphthalimide derivative (BPND) bearing tertiary amine groups has been developed as a high‐performance photoinitiator in combination with 2,4,6‐tris(trichloromethyl)‐1,3,5‐triazine or an iodonium salt for both the free radical polymerization (FRP) of acrylates and the cationic polymerization (CP) of epoxides upon exposure to near UV and visible LEDs (385–470 nm). BPND can even produ ...
DOI:
10.1002/pola.27451

39. A bidirectional screw‐sense induction of poly(quinoxaline‐2,3‐diyl)s that depends on the degree of polymerization

Author:
Yuuya Nagata; Tsuyoshi Nishikawa; Ken Terao; Hirokazu Hasegawa; Michinori Suginome
Source:
Journal of polymer science 2019 v.57 no.3 pp. 260-263
ISSN:
0887-624X
Subject:
composite polymers; cyclohexanes; polymerization; theoretical models
Abstract:
... Poly(quinoxaline‐2,3‐diyl)s containing (S)‐3‐octyloxymethyl side chains with low degree of polymerization exhibited M‐helical conformations in cyclohexane, while the polymers with high low degree of polymerization adopt P‐helical conformations. This bidirectional screw‐sense induction can be rationalized based on a modified theoretical model, which includes the effect of the terminal groups. Furth ...
DOI:
10.1002/pola.29224

40. A buckling mechanics approach to elastic modulus determination of glassy polymer films

Author:
Mitchell L. Rencheck; Ricardo Rodriguez; Nolan A. Miller; Chelsea S. Davis
Source:
Journal of polymer science 2019 v.57 no.1 pp. 15-20
ISSN:
0887-6266
Subject:
films (materials); geometry; mechanics; modulus of elasticity; polyethylene terephthalates
Abstract:
... Column buckling mechanics were examined as a technique to determine the modulus of glassy polymer films that fail at very low strains in tension. As an alternative modulus measurement technique, free‐standing column buckling (FSCB) mechanics were investigated here. Given the film geometries and the critical buckling load, classical relationships can be used to determine the modulus. Several polyme ...
DOI:
10.1002/polb.24755

41. A comparative analysis of SET-LRP of MA in solvents mediating different degrees of disproportionation of Cu(I)Br

Author:
Lligadas, Gerard; Percec, Virgil
Source:
Journal of polymer science 2008 v.46 no.20 pp. 6880-6895
ISSN:
0887-624X
Subject:
bromides; copper; dimethyl sulfoxide; electron transfer; nuclear magnetic resonance spectroscopy; polymerization; polymers; solvents; toluene
Abstract:
... Cu(I)Br/Me₆-TREN species are unstable and disproportionate into metallic Cu(0) and Cu(II)Br₂/Me₆-TREN in DMSO, whereas in toluene are stable and do not undergo disproportionation, at least at 25 °C. To estimate the role of the disproportionating solvent in single electron-transfer living radical polymerization (SET-LRP) a comparative analysis of Cu(0)/Me₆-TREN-catalyzed polymerization of MA initia ...
DOI:
10.1002/pola.22998

42. A comparative study of calorimetric methods to determine the crosslinking degree of the ethylene‐Co‐vinyl acetate polymer used as a photovoltaic encapsulant

Author:
Stéphane Ogier; Chloé Vidal; David Chapron; Patrice Bourson; Isabelle Royaud; Marc Ponçot; Marion Vite; Manuel Hidalgo
Source:
Journal of polymer science 2017 v.55 no.11 pp. 866-876
ISSN:
0887-6266
Subject:
acetates; annealing; calorimetry; composite polymers; crosslinking; crystallites; crystallization; manufacturing; physics; solar collectors
Abstract:
... EVA copolymer foils are widely used as encapsulants for photovoltaic (PV) cells in PV modules. These foils need to be crosslinked during module manufacturing, to enhance their properties. Accurate and reliable methods for the determination of their crosslinking degree are thus very important. In this work, two semi‐empirical calorimetric methods are considered and compared to a scientifically soun ...
DOI:
10.1002/polb.24335

43. A comparative study of jet formation in nozzle‐ and nozzle‐less centrifugal spinning systems

Author:
Huaizhong Xu; Huanhuan Chen; Xianglong Li; Chen Liu; Bin Yang
Source:
Journal of polymer science 2014 v.52 no.23 pp. 1547-1559
ISSN:
0887-6266
Subject:
centrifugation; chemical concentration; polymers; solutions; spinning; surface tension; velocity; whipping
Abstract:
... Centrifugal spinning, a recently developed approach for ultra‐fine fiber production, has attracted much attention as compared with the electrospinning, due to its high yield, no solution polarity and high‐voltage electrostatic field requirements, etc. In this study, the jet formation process and spinning parameters on jet path are explored and compared in nozzle‐ and nozzle‐less centrifugal spinni ...
DOI:
10.1002/polb.23596

44. A comparative study of temperature dependence of induction time and oscillatory frequency in polymer-immobilized and free catalyst Belousov-Zhabotinsky reactions

Author:
Pullela, Srinivasa R.; Shen, Jingyi; Marquez, Manuel; Cheng, Zhengdong
Source:
Journal of polymer science 2009 v.47 no.9 pp. 847-854
ISSN:
0887-6266
Subject:
catalysts; polymers; reaction kinetics; ruthenium; temperature
Abstract:
... Environment-sensitive poly(N-isopropylacrylamide) (PNIPAM) microgel particles with covalently bonded ruthenium(4-vinyl-4'-methyl-2,2'-bipyridine) bis (2,2'-bipyridine) [Ru(vmbipy)(bipy)₂] display periodic size changes when placed in Belousov-Zhabotinsky (BZ) reaction substrates. The temperature dependency of the induction time and oscillatory frequency of the BZ reaction in this polymer-immobilize ...
DOI:
10.1002/polb.21682

45. A complete TSDC description of molecular mobilities in polylactide/starch blends from local to normal modes: Effect of composition, moisture, and crystallinity

Author:
Estrella Laredo; Dinorah Newman; Romina Pezzoli; Alejandro J. Müller; Alfredo Bello
Source:
Journal of polymer science 2016 v.54 no.6 pp. 680-691
ISSN:
0887-6266
Subject:
X-radiation; absorption; biodegradability; crystal structure; crystallites; crystallization; polylactic acid; starch; temperature
Abstract:
... Thermally stimulated depolarization current is applied to study the dielectric relaxations coexisting from 80 to 380 K in the PLLA/starch, immiscible biodegradable blend system. The relaxation parameters are determined for chain mobilities at different ranges, whether in the amorphous or cold‐crystallized state for PLLA, and totally amorphous one for starch as demonstrated by wide‐angle X‐ray scat ...
DOI:
10.1002/polb.23963

46. A comprehensive investigation into "controlled/living" chain growth crosslinking copolymerization including a back to basics modeling

Author:
Poly, Julien; Wilson, D.James; Destarac, Mathias; Taton, Daniel
Source:
Journal of polymer science 2009 v.47 no.20 pp. 5313-5327
ISSN:
0887-624X
Subject:
crosslinking; equations; models; molecular weight; polymers
Abstract:
... The mainstay of this description is a modeling of "controlled/living" chain growth crosslinking copolymerization (C/L CC) that is based on a simple equivalent kinetic scheme, resulting from assumptions consistent with an ideal C/L behavior. Analytical expressions of the double bond concentration according to reaction parameters are derived from the corresponding set of differential equations, and ...
DOI:
10.1002/pola.23580

47. A computational approach to the free radical polymerization kinetics of alkyl α‐hydroxymethacrylate monomers: A structure–reactivity relationship

Author:
Mehtap Işık; Özlem Karahan; Duygu Avci; Viktorya Aviyente
Source:
Journal of polymer science 2013 v.51 no.11 pp. 2375-2384
ISSN:
0887-624X
Subject:
data collection; density functional theory; energy; free radicals; ionization; isotropy; models; polymerization; polymers; quantitative structure-activity relationships; quantum mechanics; regression analysis
Abstract:
... Density functional theory calculations at the B3LYP/6–31+G(d) level were carried out for 16 alkyl α‐hydroxymethacrylate (RHMA) monomers, and the calculated quantum chemical descriptors were used to construct a quantitative structure–activity relationship model of the reactivity parameters of those monomers. A multiple regression analysis was adopted to predict the polymerization kinetics. The mole ...
DOI:
10.1002/pola.26622

48. A computational structure–property relationship study of glass transition temperatures for a diverse set of polymers

Author:
Min Chen; Farukh Jabeen; Bakhtiyor Rasulev; Martin Ossowski; Philip Boudjouk
Source:
Journal of polymer science 2018 v.56 no.11 pp. 877-885
ISSN:
0887-6266
Subject:
correlation; glass transition temperature; models; polymers; quantitative structure-activity relationships
Abstract:
... The glass transition temperature (Tg) is one of the most important properties affecting the stability of a polymeric material. A cheminformatics‐based approach has been employed to investigate the glass transition temperatures for a set of polymers. Specifically, a set of 80 polymers was used to build a quantitative structure–property relationship (QSAR). By applying a combination of cheminformati ...
DOI:
10.1002/polb.24602

49. A conjugated alkyne functional bicyclic polybenzoxazine with superior heat resistance

Author:
Pengcheng Li; Jie Dai; Yi Xu; Qichao Ran; Yi Gu
Source:
Journal of polymer science 2019 v.57 no.14 pp. 1587-1592
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; alkynes; crosslinking; cycloaddition reactions; differential scanning calorimetry; glass transition temperature; heat; moieties; nitrogen; nuclear magnetic resonance spectroscopy; polymers; resins; thermal properties; thermogravimetry
Abstract:
... A difunctional benzoxazine (coPh‐apa) with a conjugated alkyne group is synthesized by the oxidative coupling reaction from a monocycle‐benzoxazine (Ph‐apa) containing an alkyne group. A model compound, 1,4‐diphenylbutadiyne (coPa), is used to study the curing reaction process of coPh‐apa by DSC, Fourier transform infrared spectroscopy, and ¹³C NMR, and the results suggest that the conjugated alky ...
DOI:
10.1002/pola.29423

50. A conjugation polyimine vitrimer: Fabrication and performance

Author:
Hua Zheng; Qi Liu; Xingfeng Lei; Yanhui Chen; Baoliang Zhang; Qiuyu Zhang
Source:
Journal of polymer science 2018 v.56 no.22 pp. 2531-2538
ISSN:
0887-624X
Subject:
catalysts; condensation reactions; crosslinking; heat; maneuverability; mechanical properties; polymers; solvents; temperature; thermal stability; toxicity
Abstract:
... Although polyimine vitrimers are a promising and invaluable class of self‐healing materials owing to their great maneuverability and fast exchange of crosslinks without catalysts, it remains a challenge to improve the mechanical properties and thermal stability of the material by simply designing their internal structures. Herein, we report a conjugation polyimine vitrimer, which was prepared by p ...
DOI:
10.1002/pola.29232

51. A convection–diffusion porous media model for moisture transport in polymer composites: Model development and validation

Author:
Liangbiao Chen; Hsing‐Wei Chu; Xuejun Fan
Source:
Journal of polymer science 2015 v.53 no.20 pp. 1440-1449
ISSN:
0887-6266
Subject:
chemical equilibrium; desorption; epoxides; heat; models; polymers; porous media; temperature; vapor pressure; vapors
Abstract:
... Moisture may cause many detrimental effects to polymers and their composites, thus inhibiting the applications of polymeric materials in hot and humid environments. In this article, a convection–diffusion porous media model is derived to better characterize rapid moisture transport in polymer composites at high temperatures. The model considers both continuum diffusion in solid and high‐pressure c ...
DOI:
10.1002/polb.23784

52. A convenient room temperature polycondensation toward hyperbranched AB₂-type all-aromatic polyesters with phenol terminal groups

Author:
Erber, Michael; Boye, Susanne; Hartmann, Tobias; Voit, Brigitte I.; Lederer, Albena
Source:
Journal of polymer science 2009 v.47 no.19 pp. 5158-5168
ISSN:
0887-624X
Subject:
ambient temperature; catalysts; esterification; fractionation; gel chromatography; melting; nuclear magnetic resonance spectroscopy; phenol; polyesters; polymerization
Abstract:
... As a convenient alternative to the classical melt polycondensation the one-pot solution polycondensation of suitable AB₂ monomers under mild conditions has been successfully adapted to hyperbranched all-aromatic polyester with phenol terminal groups. The polymerization was performed in solution at room temperature directly using commercially available 3,5-dihydroxybenzoic acid as monomer and 4-(di ...
DOI:
10.1002/pola.23567

53. A convenient route to PHB macromonomers via anionically controlled moderate‐temperature degradation of PHB

Author:
kawalec, Michał; Sobota, Michał; Scandola, Mariastella; Kowalczuk, Marek; Kurcok, Piotr
Source:
Journal of polymer science 2010 v.48 no.23 pp. 5490-5497
ISSN:
0887-624X
Subject:
acetic acid; alkali metals; calcium; carbonic acid; extrusion; magnesium; nuclear magnetic resonance spectroscopy; organic salts; polymers; temperature; thermal stability; zinc
Abstract:
... The degradation of poly(3‐hydroxybutyrate)s in homo‐ and heterogeneous mixtures with selected salts of organic and mineral acids was investigated. Nonvolatile degradation products, of processes conducted at moderate temperatures (150-170 °C), were analyzed using ¹H NMR. Analysis of results revealed a significant decrease in poly([R]‐3‐hydroxybutyrate) (PHB) thermal stability in the presence of ace ...
DOI:
10.1002/pola.24357

54. A convenient synthesis of α,α′‐ homo‐ and α,α′‐hetero‐bifunctionalized poly(ε‐caprolactone)s by ring opening polymerization: The potentially valuable precursors for miktoarm star copolymers

Author:
Sachin S. Patil; Bhausaheb V. Tawade; Prakash P. Wadgaonkar
Source:
Journal of polymer science 2016 v.54 no.6 pp. 844-860
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; carbon; composite polymers; copper; ethylene glycol; gel chromatography; methanol; molecular weight; nuclear magnetic resonance spectroscopy; polyethylene glycol; polymerization; stable isotopes; thiols
Abstract:
... Two new ring opening polymerization (ROP) initiators, namely, (3‐allyl‐2‐(allyloxy)phenyl)methanol and (3‐allyl‐2‐(prop‐2‐yn‐1‐yloxy)phenyl)methanol each containing two reactive functionalities viz. allyl, allyloxy and allyl, propargyloxy, respectively, were synthesized from 3‐allylsalicyaldehyde as a starting material. Well defined α‐allyl, α′‐allyloxy and α‐allyl, α′‐propargyloxy bifunctionalize ...
DOI:
10.1002/pola.27924

55. A degradable atom transfer radical polymerization inimer: Synthesis, polymerization, and cleavage of the resulting polymer products

Author:
Marios Elladiou; Costas S. Patrickios
Source:
Journal of polymer science 2017 v.55 no.17 pp. 2831-2839
ISSN:
0887-624X
Subject:
alkaline hydrolysis; ambient temperature; esterification; moieties; organobromine compounds; organochlorine compounds; polymerization; polymers; sodium; thermal degradation
Abstract:
... A novel degradable inimer for atom transfer radical polymerization (ATRP), 2‐(6‐(2‐((2‐bromo‐2‐methylpropanoyl)oxy)ethyl)pyridin‐2‐yl)ethyl methacrylate (PyDEBrMΑ), was synthesized by the two‐step esterification of 2,6‐pyridinediethanol, first with α‐bromoisobutyryl bromide in order to introduce the initiator moiety, and then with methacryloyl chloride in order to introduce the monomer moiety. PyD ...
DOI:
10.1002/pola.28689

56. A degradable, porous, emulsion-templated polyacrylate

Author:
Lumelsky, Yulia; Lalush-Michael, Inbal; Levenberg, Shulamit; Silverstein, Michael S.
Source:
Journal of polymer science 2009 v.47 no.24 pp. 7043-7053
ISSN:
0887-624X
Subject:
absorption; aqueous solutions; cell adhesion; crosslinking; emulsions; glass transition; hydrolysis; polymerization; polymers; sodium hydroxide; temperature; tissue engineering
Abstract:
... A polyHIPE is a highly porous, emulsion-templated polymer synthesized by polymerizing a monomer and a crosslinking comonomer in the continuous phase of a high-internal phase emulsion (HIPE). The synthesis of degradable polyHIPE could be of interest for biomedical applications such as tissue engineering scaffolds. In this research, a poly(ε-caprolactone) (PCL) oligomer with terminal vinyl groups wa ...
DOI:
10.1002/pola.23744

57. A density functional theory computational study of the role of ligand on the stability of CuI and CuII species associated with ATRP and SET-LRP

Author:
Rosen, Brad M.; Percec, Virgil
Source:
Journal of polymer science 2007 v.45 no.21 pp. 4950-4964
ISSN:
0887-624X
Subject:
electron transfer; energy; ligands; oxidation; polymerization; polymers; solvents
Abstract:
... Atom transfer radical polymerization (ATRP) and single electron-transfer living radical polymerization (SET-LRP) both utilize copper complexes of various oxidation states with N-ligands to perform their respective activation and deactivation steps. Herein, we utilize DFT (B3YLP) methods to determine the preferred ligand-binding geometries for Cu/N-ligand complexes related to ATRP and SET-LRP. We f ...
DOI:
10.1002/pola.22328

58. A dismantlable photoadhesion system fabricated by an anionic UV curing of epoxy resins with a base amplifier having a disulfide bond

Author:
Masahiro Furutani; Ayaru Kakinuma; Koji Arimitsu
Source:
Journal of polymer science 2018 v.56 no.2 pp. 237-241
ISSN:
0887-624X
Subject:
adhesion; crosslinking; diamines; disulfide bonds; epoxides; heat; polymers; resins; ultraviolet radiation
Abstract:
... A base amplifier (BA) that autocatalytically generates a diamine having a disulfide bond has been developed. Diamines generated from this BA are integrated into cross‐linked networks of epoxy resins that also have disulfide bonds. Anionic UV curing is performed using a photobase generator, the BA and the epoxy resins, and cured films are obtained after UV irradiation and subsequent heating at 160 ...
DOI:
10.1002/pola.28898

59. A di‐tert‐butyl acrylate monomer for controlled radical photopolymerization

Author:
Zachariah A. Page; Raghida Bou Zerdan; Will R. Gutekunst; Athina Anastasaki; Sungbaek Seo; Alaina J. McGrath; David J. Lunn; Paul G. Clark; Craig J. Hawker
Source:
Journal of polymer science 2017 v.55 no.5 pp. 801-807
ISSN:
0887-624X
Subject:
adsorbents; carboxylic acids; copper; polyacrylic acid; polymerization
Abstract:
... A new di‐tert‐butyl acrylate (diTBA) monomer for controlled radical polymerization is reported. This monomer complements the classical use of tert‐butyl acrylate (TBA) for synthesis of poly(acrylic acid) by increasing the density of carboxylic acids per repeat unit, while also increasing the flexibility of the carboxylic acid side‐chains. The monomer is well behaved under Cu(II)‐mediated photoindu ...
DOI:
10.1002/pola.28443

60. A doubly responsive AB diblock copolymer: RAFT synthesis and aqueous solution properties of poly (N-isopropylacrylamide-block-4-vinylbenzoic acid)

Author:
Lowe, Andrew B.; Torres, Marry; Wang, Ran
Source:
Journal of polymer science 2007 v.45 no.24 pp. 5864-5871
ISSN:
0887-624X
Subject:
ambient temperature; aqueous solutions; composite polymers; gel chromatography; hydrophilicity; hydrophobicity; light scattering; micelles; nuclear magnetic resonance spectroscopy; pH; polymerization
Abstract:
... We describe herein the synthesis and self-assembly characteristics of a doubly responsive AB diblock copolymer comprised of N-isopropylacrylamide (NIPAM) and 4-vinylbenzoic acid (VBZ). The AB diblock copolymer was prepared via reversible addition-fragmentation chain transfer (RAFT) radical polymerization in DMF employing a trithiocarbonate-based RAFT agent. PolyNIPAM was employed as the macroRAFT ...
DOI:
10.1002/pola.22338

61. A facile and controllable synthesis of dual‐crosslinked elastomers based on linear bifunctional polydimethylsiloxane oligomers

Author:
Yang You; Weiyan Huang; Anqiang Zhang; Yaling Lin
Source:
Journal of polymer science 2016 v.54 no.23 pp. 3760-3768
ISSN:
0887-624X
Subject:
crosslinking; hydrogen bonding; mechanical properties; nuclear magnetic resonance spectroscopy; polydimethylsiloxane; solvents; viscoelasticity
Abstract:
... Dual‐crosslinked supramolecular elastomers with the hybrid network consisting of hydrogen bonds and covalent bonds combine the reversibility of hydrogen bond and mechanical properties of covalent crosslinking network. In this article, isocyanate mixture is used as curing agent to prepare dual‐crosslinked elastomer based on bifunctional polydimethylsiloxane under mild condition. This method can eff ...
DOI:
10.1002/pola.28275

62. A facile approach to fabricate hierarchically structured poly(3‐hexylthiophene‐2,5‐diyl) films

Author:
Weihua Zhang; Chuanyong Zong; Jixun Xie; Juanjuan Wang; Haipeng Ji; Conghua Lu; Hongfei Li; Jens Wenzel Andreasen; Shichun Jiang
Source:
Journal of polymer science 2017 v.55 no.12 pp. 928-939
ISSN:
0887-6266
Subject:
absorption; coatings; fluorescence; microstructure; oxygen; photovoltaic cells; polydimethylsiloxane; solvents; ultraviolet-visible spectroscopy; vapors
Abstract:
... Microstructured surfaces have great potentials to improve the performances and efficiency of optoelectronic devices. In this work, a simple robust approach based on surface instabilities was presented to fabricate poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) films with ridge‐like/wrinkled composite microstructures. Namely, the hierarchically patterned films were prepared by spin coating the P3HT/tetrahy ...
DOI:
10.1002/polb.24339

63. A facile method for the preparation of monodisperse hollow silica spheres with controlled shell thickness

Author:
Cao, Shunsheng; Jin, Xin; Yuan, Xinhua; Wu, Weiwei; Hu, Jie; Sheng, Weichen
Source:
Journal of polymer science 2010 v.48 no.6 pp. 1332-1338
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; electrostatic interactions; polymerization; polystyrenes; scanning electron microscopes; silica; sol-gel processing; thermogravimetry; transmission electron microscopy
Abstract:
... This article presents a facile, effective, mild synthesis process for well-defined hollow spheres by using cationic polystyrene (PS) submicro-particles as templates. In this approach, the cationic PS templates can be first prepared via emulsifier-free polymerization by using the cationic monomer 2-(methacryloyloxy) ethyltrimethylammonium chloride as comonomer, then, the silica shells from the sol- ...
DOI:
10.1002/pola.23894

64. A facile method to fabricate tough hydrogel with ultra‐wide adjustable stiffness, stress, and fast recoverability

Author:
Shuangfei Xiang; Ting Li; Weifu Dong; Qinghua Lu
Source:
Journal of polymer science 2018 v.56 no.21 pp. 1469-1474
ISSN:
0887-6266
Subject:
acrylic acid; copolymerization; crosslinking; energy; hydrogels; hydrogen bonding; hydrophobicity; microstructure; modulus of elasticity; polymers; scanning electron microscopy; separation; surfactants; synergism; tensile strength
Abstract:
... In this article, we report a synergistic strategy to develop dual physically cross‐linked tough hydrogels via one‐pot bulk copolymerization of N‐vinyl‐2‐pyrrolidone, acrylic acid, and stearyl methylacrylate (SMA) without any adscititious surfactant. Due to synergic effects of hydrogen bonding and hydrophobic association, the resulted dual physically cross‐linked hydrogels (DP Gel) with ultra‐wide ...
DOI:
10.1002/polb.24737

65. A facile method to synthesize high‐molecular‐weight biobased polyesters from 2,5‐furandicarboxylic acid and long‐chain diols

Author:
Vasilios Tsanaktsis; George Z. Papageorgiou; Dimitrios N. Bikiaris
Source:
Journal of polymer science 2015 v.53 no.22 pp. 2617-2632
ISSN:
0887-624X
Subject:
boiling; chemical structure; gel chromatography; glycols; mechanical properties; melting; molecular weight; nuclear magnetic resonance spectroscopy; polyesters; temperature; transesterification
Abstract:
... In this study, biobased furan dicarboxylate polyesters have been prepared using 2,5‐furandicarboxylic acid (FDCA) and diols with high number of methylene groups (long‐chain diols), namely, 8, 9, 10, and 12. Because of the high boiling points of these diols, a modified procedure of the well‐known melt polycondensation was applied in this work. According to this, the dimethyl ester of FDCA (DMFD) re ...
DOI:
10.1002/pola.27730

66. A facile pathway for the fast synthesis of colloidal crystal-loaded hydrogels via frontal polymerization

Author:
Liu, Si-Si; Yu, Zi-Yi; Fang, Yuan; Yin, Su-Na; Wang, Cai-Feng; Chen, Li; Chen, Su
Source:
Journal of polymer science 2011 v.49 no.14 pp. 3121-3128
ISSN:
0887-624X
Subject:
acrylic acid; glycerol; hydrocolloids; methanol; pH; polymerization; polystyrenes; scanning electron microscopy; temperature
Abstract:
... In this work, a dually sensitive colloidal crystal (CC)-loaded hydrogel has been synthesized via frontal polymerization (FP) in a facile and rapid way. First, a polystyrene CC film was fabricated by vertical deposition on the inner wall of a test tube. Then, a mixture of acrylic acid (AAc), 2-hydroxyethyl methacrylate (HEMA), and glycerol along with the initiator and crosslinker was added to this ...
DOI:
10.1002/pola.24749

67. A facile route of polythiophene nanoparticles via Fe³⁺-catalyzed oxidative polymerization in aqueous medium

Author:
Lee, Sun Jong; Lee, Jung Min; Cheong, In Woo; Lee, Hoosung; Kim, Jung Hyun
Source:
Journal of polymer science 2008 v.46 no.6 pp. 2097-2107
ISSN:
0887-624X
Subject:
absorption; anionic surfactants; catalysts; droplets; emulsions; ferric chloride; nanoparticles; oxidants; particle size; particle size distribution; photoluminescence; polymerization; polymers; solubility; solvents; thiophene; wavelengths
Abstract:
... We have demonstrated that unsubstituted thiophene can be polymerized by Fe³⁺-catalyzed oxidative polymerization inside nanosized thiophene monomer droplets, that is, nanoreactors, dispersed in aqueous medium, which can be performed under acidic solution conditions with anionic surfactant. Besides, we proposed a synthetic mechanism for the formation of the unsubstituted polythiophene nanoparticles ...
DOI:
10.1002/pola.22544

68. A facile route to hollow superparamagnetic magnetite/polystyrene nanocomposite microspheres via inverse miniemulsion polymerization

Author:
Yang, Song; Liu, Huarong; Zhang, Zhicheng
Source:
Journal of polymer science 2008 v.46 no.12 pp. 3900-3910
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; X-ray photoelectron spectroscopy; ambient temperature; droplets; hysteresis; magnetite; nanocomposites; nanoparticles; polymerization; polystyrenes; scanning electron microscopy; styrene; thermogravimetry; transmission electron microscopy
Abstract:
... In this article, we report a facile route to the preparation of hollow superparamagnetic magnetite/polystyrene nanocomposite microspheres via inverse miniemulsion polymerization at room temperature and under ambient pressure. Water droplets act as a soft template for the formation of hollow structure. Meanwhile, the existence of amphipathic magnetite nanoparticles (MPs) which can assemble at the i ...
DOI:
10.1002/pola.22700

69. A facile route to ureidopyrimidinone‐functionalized polymers via RAFT

Author:
Celiz, Adam D.; Scherman, Oren A.
Source:
Journal of polymer science 2010 v.48 no.24 pp. 5833-5841
ISSN:
0887-624X
Subject:
composite polymers; differential scanning calorimetry; gel chromatography; nuclear magnetic resonance spectroscopy; polymerization; stable isotopes; ultraviolet-visible spectroscopy
Abstract:
... Three new ureidopyrimidinone(UPy)‐functionalized chain‐transfer agents (CTAs) have been synthesized for use in reversible addition‐fragmentation chain transfer (RAFT) polymerization. These UPy‐CTAs are able to polymerize a wide variety of vinyl monomers to yield UPy‐functionalized polymers, including homopolymers, block copolymers, and amphiphilic block copolymers. These polymers have been charact ...
DOI:
10.1002/pola.24391

70. A facile strategy to modify TiO2 nanoparticles via surface‐initiated ATRP of styrene

Author:
Wenping Wang; Hengming Cao; Guojun Zhu; Peng Wang
Source:
Journal of polymer science 2010 v.48 no.8 pp. 1782-1790
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; X-ray photoelectron spectroscopy; catalysts; chemical structure; glass transition temperature; molecular weight; nanocomposites; nanoparticles; nuclear magnetic resonance spectroscopy; polymerization; polystyrenes; scanning electron microscopy; styrene; thermal properties; titanium dioxide; transmission electron microscopy
Abstract:
... A core‐shell hybrid nanocomposites, possessing a hard core of nano titanium dioxide (n‐TiO₂) and a soft shell of brushlike polystyrene (PS), were successfully prepared by surface‐initiated atom transfer radical polymerization (ATRP) at 90 °C in anisole solution using CuBr/PMDETA as the catalyst, in the presence of sacrificial initiator. FTIR, ¹H NMR, XPS, TEM, SEM, TGA, and DSC were used to determ ...
DOI:
10.1002/pola.23946

71. A facile synthesis of catechol‐functionalized poly(ethylene oxide) block and random copolymers

Author:
Kaila M. Mattson; Allegra A. Latimer; Alaina J. McGrath; Nathaniel A. Lynd; Pontus Lundberg; Zachary M. Hudson; Craig J. Hawker
Source:
Journal of polymer science 2015 v.53 no.23 pp. 2685-2692
ISSN:
0887-624X
Subject:
catechol; composite polymers; molecular weight; polyethylene glycol
Abstract:
... Herein we develop a facile synthetic strategy for the functionalization of well‐defined polyether copolymers with control over the number and location of catechol groups. Previously, the functionalization of polyethylene oxide (PEO)‐based polymers with catechols has been limited to functionalization of the chain ends only, hampering the synthesis of adhesive and antifouling materials based on this ...
DOI:
10.1002/pola.27749

72. A facile synthetic strategy for hyperbranched polymer via combining free radical telomerization and polycondensation

Author:
Liu, Jianhua; Zhan, Fu; Fu, Qi; Zhu, Xiangyang; Shi, Wenfang
Source:
Journal of polymer science 2008 v.46 no.22 pp. 7543-7555
ISSN:
0887-624X
Subject:
beta-mercaptoethanol; polymers; transesterification
Abstract:
... A facile strategy combining free radical telomerization and polycondensation to prepare hyperbranched polymers was developed. By selecting a suitable telogen and a vinyl monomer, the product obtained by telomerization could be regarded as an ABn type monomer for preparing a hyperbranched polymer via conventional polycondensation. The principles for selecting vinyl monomers and telogens were propos ...
DOI:
10.1002/pola.23060

73. A fully biobased epoxy resin from vegetable oils: From the synthesis of the precursors by thiol-ene reaction to the study of the final material

Author:
Stemmelen, M.; Pessel, F.; Lapinte, V.; Caillol, S.; Habas, J.-P.; Robin, J.-J.
Source:
Journal of polymer science 2011 v.49 no.11 pp. 2434-2444
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; chemical analysis; crosslinking; epoxides; grapeseed oil; linseed oil; mixing; nuclear magnetic resonance spectroscopy; polyamines; polymers; rheology; vegetable oil; viscometry
Abstract:
... A novel vegetable oil-based polyamine issued from grapeseed oil (GSO) was prepared using cysteamine chloride (CAHC) by thiol-ene coupling (TEC). The structure of the polyamine oil (AGSO) was carefully examined using a large range of chemical analyses (FTIR, ¹H NMR and ¹³C NMR, LC-MS…). The effects of the amination of GSO on the vegetable oil properties were also studied using viscosimetry. Then, A ...
DOI:
10.1002/pola.24674

74. A fully coupled thermo‐viscoelastic finite element model for self‐folding shape memory polymer sheets

Author:
Russell W. Mailen; Michael D. Dickey; Jan Genzer; Mohammed A. Zikry
Source:
Journal of polymer science 2017 v.55 no.16 pp. 1207-1219
ISSN:
0887-6266
Subject:
finite element analysis; guidelines; heat transfer; models; polymers; stress relaxation; surface temperature
Abstract:
... The thermo‐mechanical response of heat activated shape memory polymers (SMPs) has been investigated using a thermo‐viscoelastic finite element analysis that accounts for external and internal heat sources. SMPs can be thermally stimulated by external heat sources, such as temperature and surface heat flux, or from internal viscous heating. Viscous heating can significantly affect the response of S ...
DOI:
10.1002/polb.24372

75. A general strategy for highly efficient nanoparticle dispersing agents based on hybrid dendritic linear block copolymers

Author:
Vestberg, Robert; Piekarski, Ashley M.; Pressly, Eric D.; Van Berkel, Kim Y.; Malkoch, Michael; Gerbac, Jeffrey; Ueno, Nobuhiko; Hawker, Craig J.
Source:
Journal of polymer science 2009 v.47 no.5 pp. 1237-1258
ISSN:
0887-624X
Subject:
composite polymers; gold; molecular weight; nanoparticles; phosphine; polymerization; polymethylmethacrylate; titanium dioxide
Abstract:
... A modular approach to the synthesis of a library of hybrid dendritic-linear copolymers was developed based on RAFT polymerization from monodisperse dendritic macroRAFT agents. By accurately controlling the molecular weight of the linear block, generation number of the dendrimer and the nature of the dendritic chains ends, the performance of these hybrid block copolymers as dispersing agents was op ...
DOI:
10.1002/pola.23186

76. A glucose sensor via stable immobilization of the GOx enzyme on an organic transistor using a polymer brush

Author:
M. Elizabeth Welch; Thomas Doublet; Christophe Bernard; George G. Malliaras; Christopher K. Ober
Source:
Journal of polymer science 2015 v.53 no.2 pp. 372-377
ISSN:
0887-624X
Subject:
brushes; electrochemistry; glucose; glucose oxidase; polymers; styrene
Abstract:
... Recently, there has been significant research in the area of organic electrochemical transistors (OECTs) because of their superior aptitude of chemical and biological sensing. Here it is shown for the first time the incorporation of polymer brushes to a transistor. Polymer brushes were chosen for their biocompatible properties and their ability to covalently tether enzymes and other biomolecules t ...
DOI:
10.1002/pola.27392

77. A green approach toward oleic- and undecylenic acid-derived polyurethanes

Author:
González-Paz, R.J.; Lluch, C.; Lligadas, G.; Ronda, J.C.; Galià, M.; Cádiz, V.
Source:
Journal of polymer science 2011 v.49 no.11 pp. 2407-2416
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; catalysts; chemical structure; cytotoxicity; glycols; irradiation; mechanical properties; molecular weight; nuclear magnetic resonance spectroscopy; oleic acid; polyurethanes; raw materials; thermoplastics; ultrasonics
Abstract:
... Naturally occurring oleic and undecylenic acids were used as raw materials for the synthesis of novel polyurethanes (PUs). The application of environmentally friendly thiol-ene additions to 10-undecenoate and oleate derivatives was studied with the goal of obtaining renewable diols. The resulting monomers were then polymerized with 4,4′-methylenebis (phenylisocyanate), in N,N-dimethylformamide sol ...
DOI:
10.1002/pola.24671

78. A green epoxidation system with poly(4-vinylpyridine) microsphere-supported molybdenum catalyst

Author:
Cao, Lijing; Yang, Mu; Wang, Ge; Wei, Yen; Sun, Dongbai
Source:
Journal of polymer science 2010 v.48 no.3 pp. 558-562
ISSN:
0887-624X
Subject:
catalysts; catalytic activity; ethanol; hydrogen peroxide; molybdenum; oxygen; polymers; solvents
Abstract:
... The immobilization of molybdenum (Mo) compounds on poly(4-vinylpyridine) (P4VP) microspheres for catalytic epoxidation was reported. P4VP-supported Mo compounds were highly efficient and selective for the epoxidation of cis-cyclooctene using hydrogen peroxide (H₂O₂) as oxygen source. When ethanol was used as solvents, outstanding catalytic activity and selectivity were observed for Mo-containing c ...
DOI:
10.1002/pola.23760

79. A highly controllable latent ruthenium Schiff base olefin metathesis catalyst: Catalyst activation and mechanistic studies

Author:
Monsaert, Stijn; Ledoux, Nele; Drozdzak, Renata; Verpoort, Francis
Source:
Journal of polymer science 2010 v.48 no.2 pp. 302-310
ISSN:
0887-624X
Subject:
Lewis acids; alcohols; catalysts; hydrochloric acid; injection molding; nuclear magnetic resonance spectroscopy; olefin; polymerization; polymers; ruthenium; schiff bases
Abstract:
... A ruthenium Schiff base catalyst (5), bearing an N-heterocyclic carbene ligand, was found to be a latent catalyst for the ring-opening metathesis polymerization of cis,cis-1,5-cyclooctadiene and dicyclopentadiene and is activated efficiently on addition of hydrochloric acid. A benchmark study was performed using the Grubbs first (1), second (2), and third (3) generation catalyst. Results further i ...
DOI:
10.1002/pola.23784

80. A highly rigid diamine monomer derived from naturally occurring myo‐inositol and its use for polyamide synthesis

Author:
Atsushi Sudo; Shou Sugita
Source:
Journal of polymer science 2016 v.54 no.21 pp. 3436-3443
ISSN:
0887-624X
Subject:
chlorides; condensation reactions; glass transition temperature; myo-inositol; polyamides; sodium azide
Abstract:
... A rigid diamine was synthesized from myo‐inositol, a naturally occurring cyclic hexaol, and used as a monomer to synthesize polyamides. myo‐Inositol was treated with 1,1‐dimethoxycyclohexane to yield a bisketal bearing two hydroxyl groups, and from this bisketal, the target diamine was synthesized in three steps: (1) derivation of the diol into the corresponding bistriflate, (2) nucleophilic subst ...
DOI:
10.1002/pola.28231

81. A humidity blocker approach to overcoming the humidity interference with cationic photopolymerization

Author:
Chen, Zhigang; Zhang, Ying; Chisholm, Bret.J.; Webster, Dean C.
Source:
Journal of polymer science 2008 v.46 no.13 pp. 4344-4351
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; humidity; hydrophobicity; polymers
Abstract:
... A humidity blocker approach to overcoming the humidity interference with cationic photopolymerization is proposed and validated. Environmental humidity is one of the major interfering factors in cationic photopolymerization, and cationic photopolymerization is found to be inhibited by high humidity. When curing cycloaliphatic epoxide based cationic UV curable materials flexibilized by various reac ...
DOI:
10.1002/pola.22754

82. A hybrid-type, chiral π-conjugated polymer wrapped with polyhedral oligomeric silsesquioxanes

Author:
Miyake, Junpei; Chujo, Yoshiki
Source:
Journal of polymer science 2008 v.46 no.18 pp. 6035-6040
ISSN:
0887-624X
Subject:
chloroform; cotton; gel chromatography; molecular weight; photoluminescence; polymerization; polymers; temperature; thermal stability; thermogravimetry; weight loss
Abstract:
... A novel hybrid-type chiral binaphthyl-based polyarylene derivative with polyhedral oligomeric silsesquioxanes (POSS) units 2a was prepared by Suzuki-Miyaura coupling polymerization from a chiral (R)-6,6'-dibromo-2,2'-diPOSS-substituted 1,1'-binaphthyl derivative 1a and p-biphenylene diboronic acid. As a reference, a binaphthyl-based polyarylene derivative without POSS unit 2b was also prepared. Th ...
DOI:
10.1002/pola.22914

83. A kind of novel nonmetallocene catalysts for ethylene polymerization

Author:
Ma, Lifu; Sheng, Yaping; Huang, Qigu; Zhao, Yangfeng; Deng, Kunxue; Li, Junlong; Yang, Wantai
Source:
Journal of polymer science 2008 v.46 no.1 pp. 33-37
ISSN:
0887-624X
Subject:
aluminum; catalysts; catalytic activity; ethylene; melting point; molecular weight; nuclear magnetic resonance spectroscopy; polyethylene; polymerization; temperature
Abstract:
... A kind of novel bridged nonmetallocene catalysts was synthesized by the treatment of N,N-imidazole and N,N-phenylimidazole with n-BuLi, and MCl₄ (M = Ti, Zr) in THF. Those catalysts were performed for ethylene polymerization after activated by methylaluminoxane (MAO). The effects of polymerization temperature, Al/M ratio, pressure of monomer, and concentration of catalysts on ethylene polymerizati ...
DOI:
10.1002/pola.22354

84. A kinetic Monte Carlo study on the nucleation mechanisms of oil-soluble initiators in the miniemulsion polymerization of styrene

Author:
Rawlston, Jonathan A.; Guo, Juchen; Schork, F. Joseph; Grover, Martha A.
Source:
Journal of polymer science 2008 v.46 no.18 pp. 6114-6128
ISSN:
0887-624X
Subject:
Monte Carlo method; algorithms; desorption; droplets; free radicals; molecular weight; polymerization; polymers; styrene; temperature
Abstract:
... The use of oil-soluble initiators in free-radical miniemulsion polymerization has increased due to their ability to generate radicals primarily within monomer droplets. Existing theories concerning the nucleation mechanism for oil-soluble initiators suggest that a single radical must be formed within a particle for propagation to occur, despite the fact that an oil-soluble initiator molecule decom ...
DOI:
10.1002/pola.22923

85. A kinked unit-containing thermotropic liquid crystalline copolyester with low glass transition temperature and broad phase transition temperature

Author:
Huang, Heng-Zhen; Chen, Li; Wang, Yu-Zhong
Source:
Journal of polymer science 2009 v.47 no.18 pp. 4703-4709
ISSN:
0887-624X
Subject:
4-hydroxybenzoic acid; Fourier transform infrared spectroscopy; X-ray diffraction; carbon; chemical structure; differential scanning calorimetry; glass transition temperature; light microscopy; mechanical properties; melting; nuclear magnetic resonance spectroscopy; polyesters; stable isotopes; thermal properties; thermogravimetry; transesterification
Abstract:
... A novel phosphorus-containing thermotropic liquid crystalline copolyester with kinked unit named as poly(hydroxybenzate-co-DOPO-benzenediol dihydrodipheyl ether terephthalate) (PHDDT) was synthesized successfully by melting transesterification from terephthalic acid (TPA), p-hydroxybenzoic acid (p-ABH), 2-(6-oxid-6H-dibenz(c, e) (1,2) oxaphosphorin 6-yl)1,4-benzenediol (DOPO-HQ), and 4,4'-dihydrox ...
DOI:
10.1002/pola.23524

86. A minimal amount of acrylonitrile turns the nitroxide-mediated polymerization of methyl methacrylate into an almost ideal controlled/living system

Author:
Nicolas, Julien; Brusseau, Ségolène; Charleux, Bernadette
Source:
Journal of polymer science 2010 v.48 no.1 pp. 34-47
ISSN:
0887-624X
Subject:
composite polymers; molecular weight; nuclear magnetic resonance spectroscopy; polymerization; quality control; stable isotopes; thermal properties
Abstract:
... Nitroxide-mediated controlled/living free-radical polymerization of methyl methacrylate initiated by the SG1-based alkoxyamine BlocBuilder was successfully performed in bulk at 80-99 °C with the help of a very small amount of acrylonitrile (AN, 2.2-8.8 mol %) as a comonomer. Well-defined PMMA-rich P(MMA-co-AN) copolymers were prepared with the number-average molar mass, Mn, in the 6.1-32 kg mol⁻¹ ...
DOI:
10.1002/pola.23749

87. A mixed cyclodextrin-biphenyl thermotropic liquid crystal: Synthesis, liquid-crystalline properties, and supramolecular organization

Author:
Chen, Li; Hu, Tian-Hui; Xie, He-Lou; Zhang, Hai-Liang
Source:
Journal of polymer science 2010 v.48 no.13 pp. 2838-2845
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; chemical structure; differential scanning calorimetry; liquid crystals; nuclear magnetic resonance spectroscopy; polymers; temperature; thermal stability; thermogravimetry
Abstract:
... A well-defined structure liquid crystal heptakis [6-deoxy-6-(1-H-1,2,3-triazol-4-yl)(methyl)6-(4-methoxybiphenyl-4′-yloxy) hexanoyl]-β-cyclodextrin (H6B-β-CD) was synthesized from propargyl 6-(4-methoxybiphenyl-4′-yloxy) hexanoate (P6B) and heptakis (6-deoxy-6-azido)-β-cyclodextrin ((N₃)₇-β-CD) by click reaction. The chemical structure of H6B-β-CD was confirmed by ¹H NMR, FTIR, and MALDI-TOF MS. T ...
DOI:
10.1002/pola.24060

88. A model for charge transport in semicrystalline polymer thin films

Author:
S. Raj Mohan; Manoranjan P. Singh; M. P. Joshi
Source:
Journal of polymer science 2019 v.57 no.3 pp. 137-141
ISSN:
0887-6266
Subject:
Monte Carlo method; electric field; model validation; models; polymers; temperature
Abstract:
... A model for simulating the charge transport properties of semicrystalline polymer (SCrP) using Monte Carlo simulation is reinvented. The model is validated by reproducing the experimentally observed field and temperature dependence of mobility in Poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) thin films. This study also provides a new physical insight to the origin of much debated negative field dependenc ...
DOI:
10.1002/polb.24770

89. A molecular dynamics simulation study of three polysulfones in dry and hydrated states

Author:
Marque, Grégory; Verdu, Jacques; Prunier, Valéry; Brown, David
Source:
Journal of polymer science 2010 v.48 no.22 pp. 2312-2336
ISSN:
0887-6266
Subject:
hydrogen bonding; hydrophilicity; models; molecular dynamics; physics; polymers; water analysis
Abstract:
... Molecular dynamics (MD) simulations of three polysulfones (poly(ether sulfone) PESU, poly(phenylene sulfone) PPSU and polysulfone PSU) in dry and hydrated states were undertaken in order to study the specific interactions between water and glassy polymer matrices of the same structural family. Dry polysulfone models were generated using a hybrid pivot Monte Carlo-MD single-chain sampling technique ...
DOI:
10.1002/polb.22117

90. A molecular‐level computational study of the diffusion and solubility of water and oxygen in carbonaceous polyethylene nanocomposites

Author:
Edvin Erdtman; Martin Bohlén; Peter Ahlström; Thomas Gkourmpis; Mikael Berlin; Thorbjörn Andersson; Kim Bolton
Source:
Journal of polymer science 2016 v.54 no.5 pp. 589-602
ISSN:
0887-6266
Subject:
carbon nanotubes; diffusivity; graphene; molecular dynamics; nanocomposites; oxygen; permeability; polyethylene; temperature; water solubility
Abstract:
... Monte Carlo and molecular dynamics simulations were performed to investigate the effect on the solubility, diffusion, and permeability of water and oxygen when adding graphene or single‐walled carbon nanotubes (SWCNTs) to polyethylene (PE). When compared with pure PE, addition of graphene lowered the solubility of water, whereas at lower temperatures, the oxygen solubility increased because of the ...
DOI:
10.1002/polb.23951

91. A new approach for controlling birefringent property of cyclic olefin copolymers

Author:
Ban, Hoang The; Hagihara, Hideaki; Nishii, Kei; Tsunogae, Yasuo; Nojima, Shuichi; Shiono, Takeshi
Source:
Journal of polymer science 2008 v.46 no.22 pp. 7395-7400
ISSN:
0887-624X
Subject:
catalysts; chemistry; composite polymers; control methods; ethylene; olefin; resins; styrene
Abstract:
... This article reports an original method to control the birefringent property of the cyclic olefin copolymer, which has been recently commercialized as a new type of optical resins, via introduction of a third monomer that possesses a negative birefringence into the cyclic olefin copolymer that exhibits an inherently positive birefringence. The mutual compensation between these opposite-sign birefr ...
DOI:
10.1002/pola.23044

92. A new cardo bisphenol monomer containing pendant azido group and the resulting aromatic polyesters

Author:
Deepak M. Maher; Samadhan S. Nagane; Uday A. Jadhav; Pravin H. Salunkhe; Bhausaheb V. Tawade; Prakash P. Wadgaonkar
Source:
Journal of polymer science 2019 v.57 no.14 pp. 1516-1526
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; X-ray diffraction; bisphenol A; chloroform; condensation reactions; cycloaddition reactions; methylene chloride; molecular weight; nuclear magnetic resonance spectroscopy; phenolphthaleins; polyesters; thermogravimetry; triethylamine; viscosity
Abstract:
... Expanding on our strategy to synthesize aromatic step‐growth polymers containing pendant clickable azido groups via functional monomer approach, we have now designed and synthesized a new cardo bisphenol, viz., 2‐(2‐azidoethyl)‐3, 3‐bis(4‐hydroxyphenyl) isoindolin‐1‐one (PPH‐N₃). PPH‐N₃ was conveniently synthesized starting from commercially available phenolphthalein by a three‐step route in an ov ...
DOI:
10.1002/pola.29414

93. A new chemical modification of liquid polybutadienes: Radical addition of aliphatic aldehydes onto pending vinyl groups

Author:
Podešva, Jiří; Hrubý, Martin; Spěváček, Jiří; Hrdličková, Miluše; Netopilík, Miloš
Source:
Journal of polymer science 2008 v.46 no.12 pp. 3919-3925
ISSN:
0887-624X
Subject:
aldehydes; crosslinking; free radicals; nuclear magnetic resonance spectroscopy; polymers; thermal degradation
Abstract:
... A new chemical modification of liquid polybutadiene by radical addition of model aldehydes (butanal and hexanal) onto pending vinyls of the polymer is described. The dibenzoyl peroxide/N,N-dimethylaniline redox system was shown to initiate the hydroacylation more efficiently than the thermal decomposition of 2,2'-azobis(2-methylpropanenitrile) because it gives higher conversions (content of hydroa ...
DOI:
10.1002/pola.22720

94. A new class of stereoregular vinylene‐arylene copolymers with double‐decker silsesquioxane in the main chain

Author:
Patrycja Żak; Beata Dudziec; Michał Dutkiewicz; Monika Ludwiczak; Bogdan Marciniec; Marek Nowicki
Source:
Journal of polymer science 2016 v.54 no.8 pp. 1044-1055
ISSN:
0887-624X
Subject:
alkadienes; composite polymers; mechanical properties
Abstract:
... A synthesis of a new macromolecular class of vinylene‐arylene copolymers with double‐decker silsesquioxane in the main chain is presented. Two transition‐metal‐catalyzed processes, which is silylative‐coupling copolycondensation (SCC) and ADMET copolymerization of divinyl‐substituted double‐decker silsesquioxanes (DDSQ‐2SiVi) with selected diolefins, are reported to be highly efficient tools for t ...
DOI:
10.1002/pola.27957

95. A new conduction phenomenon observed in polyethylene and epoxy resin: Ultra-fast soliton conduction

Author:
Montanari, G.C.; Fabiani, D.; Dissado, L.A.
Source:
Journal of polymer science 2011 v.49 no.16 pp. 1173-1182
ISSN:
0887-6266
Subject:
epoxides; mechanical properties; models; polyethylene; resins
Abstract:
... A new conduction mechanism in polyethylene and epoxy resin is presented and discussed in this article. This mechanism is based on the presence of charge pulses that can be seen as solitons (solitary waves) crossing dielectrics with mobility 4-5 orders of magnitude larger than that of conventional charge carriers. The nature of this new process that is characterized by charge pulses with such high ...
DOI:
10.1002/polb.22296

96. A new controllable approach to synthesize hyperbranched poly(siloxysilanes)

Author:
Wang, Sheng-Jie; Fan, Xiao-Dong; Kong, Jie; Wang, Xin; Liu, Yu-Yang; Zhang, Guo-Bin
Source:
Journal of polymer science 2008 v.46 no.8 pp. 2708-2720
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; carbon; hydrides; molecular weight; nuclear magnetic resonance spectroscopy; polymerization; polymers; silicon; stable isotopes
Abstract:
... A new controllable approach to synthesize hyperbranched poly(siloxysilanes) via hydrosilylation of A₂- and B'Bx-type monomers was developed in this work. A₂ monomers (dimethylbis(dimethylsiloxy)siloxane and tetramethyldisiloxane), B'Bx monomers (methylvinyldiallylsilane and vinyltriallylsilane), and the resultant hyperbranched poly(siloxysilanes) were well characterized using FTIR, ¹H NMR, ¹³C NMR ...
DOI:
10.1002/pola.22604

97. A new design of cleavable acetal‐containing amphiphilic block copolymers triggered by light

Author:
Yu Huang; Srinivas Thanneeru; Qian Zhang; Jie He
Source:
Journal of polymer science 2018 v.56 no.16 pp. 1815-1824
ISSN:
0887-624X
Subject:
benzaldehyde; composite polymers; dissociation; drug delivery systems; esters; hydrolysis; molecular weight; nuclear magnetic resonance spectroscopy; pH; polyethylene glycol; polymerization; ultraviolet-visible spectroscopy
Abstract:
... We report a new design of photolabile acetal‐containing amphiphilic block copolymers. Acetals as protecting groups for carbonyls or diols can be hydrolyzed under acidic condition but very stable with respect to hydrolysis at pH > 7. When combining light‐capturing chromophores with acetals, the hydrolysis of acetals can be activated by light to design dual responsive acetal‐containing polymers. Usi ...
DOI:
10.1002/pola.29062

98. A new donor-acceptor double-cable carbazole polymer with perylene bisimide pendant group: Synthesis, electrochemical, and photovoltaic properties

Author:
Koyuncu, Sermet; Zafer, Ceylan; Koyuncu, Fatma Baycan; Aydin, Banu; Can, Mustafa; Sefer, Emre; Ozdemir, Eyup; Icli, Siddik
Source:
Journal of polymer science 2009 v.47 no.22 pp. 6280-6291
ISSN:
0887-624X
Subject:
absorption; color; dyes; electrochemistry; electron transfer; fluorescence; polymers; spectroscopy
Abstract:
... We report here electrochemical synthesis of novel soluble donor-acceptor (D-A) polymer with suitably functionalized perylenetetracarboxylic diimide dye derivative covalently linked to carbazole moiety (Cbz-PDI). The band gap, Eg was measured using UV-Vis spectroscopy and compared with that obtained by cyclic voltammetry (CV). Efficient intramolecular electron transfer from carbazole-donor to peryn ...
DOI:
10.1002/pola.23671

99. A new donor-acceptor type polymeric material from a thiophene derivative and its electrochromic properties

Author:
Udum, Yasemin Arslan; Yildiz, Ersin; Gunbas, Gorkem; Toppare, Levent
Source:
Journal of polymer science 2008 v.46 no.11 pp. 3723-3731
ISSN:
0887-624X
Subject:
Fourier transform infrared spectroscopy; color; colorimetry; electrochemistry; polymers; thiophene
Abstract:
... A new electrochromic polymer, poly(2,3,5,8-tetra(thiophen-2-yl)quinoxaline) (PTTQ), was synthesized electrochemically and its electrochromic properties were investigated. The polymer was characterized by Cyclic Voltammetry, Fourier Transform infrared spectroscopy, UV-Vis-NIR Spectroscopy, and colorimetry. Spectroelectrochemistry analysis demonstrated that the polymer can undergo both p- and true n ...
DOI:
10.1002/pola.22713

100. A new enone-containing triglyceride derivative as precursor of thermosets from renewable resources

Author:
Montero de Espinosa, L.; Ronda, J.C.; Galià, M.; Cádiz, V.
Source:
Journal of polymer science 2008 v.46 no.20 pp. 6843-6850
ISSN:
0887-624X
Subject:
crosslinking; oleic acid; polymers; renewable resources; sunflower oil; thermal properties; triacylglycerols; vegetable oil
Abstract:
... A novel triglyceride containing α,β-unsaturated ketone was prepared through photoperoxidation from high oleic sunflower oil by two steps one pot environmentally friendly procedure. This new enone-containing triglyceride was crosslinked with diaminodiphenylmethane (DDM) via aza-Michael addition. A kinetic study of the reaction of p-toluidine with either enone-containing methyl oleate or epoxidized ...
DOI:
10.1002/pola.22992