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- Author:
- Guan, Qingbao; Norder, Ben; Chu, Liangyong; Besseling, Nicolaas
A. M.; Picken, Stephen J.; Dingemans, Theo J.
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8549-8562
- ISSN:
- 1520-5835
- Subject:
- 4-hydroxybenzoic acid; atomic force microscopy; composite polymers; crosslinking; glass transition temperature; heat treatment; isotropy; liquid crystals; melting; polymerization; scanning electron microscopy; separation; texture; transesterification
- Abstract:
- ... We have prepared (AB)ₙ-multiblock copolymers based on N-(3′-hydroxyphenyl)trimellitimide (IM), 4-hydroxybenzoic acid (HBA), and 6-hydroxy-2-naphthoic acid (HNA) via a simple one-pot melt condensation method. The blocky nature is the result of phase separation taking place in the early stages of the melt polymerization process. The liquid crystal HBA/HNA fraction phase separates from the isotropic ...
- DOI:
- 10.1021/acs.macromol.6b01341
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01341
- Author:
- Enke, Marcel; Bose, Ranjita K.; Bode, Stefan; Vitz, Jürgen; Schacher, Felix
H.; Garcia, Santiago J.; van der
Zwaag, Sybrand; Hager, Martin D.; Schubert, Ulrich S.
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8418-8429
- ISSN:
- 1520-5835
- Subject:
- chlorides; composite polymers; crosslinking; ligands; manganese; polymerization; polystyrenes; rheological properties
- Abstract:
- ... Different block copolymers containing terpyridine were synthesized applying the reversible addition–fragmentation chain transfer (RAFT) polymerization. The block copolymers contain polystyrene as hard block, and the soft block consists of n-butyl acrylate (BA) as well as terpyridine units as ligand. These block copolymers were further cross-linked with several metal salts in order to tune the self ...
- DOI:
- 10.1021/acs.macromol.6b02108
-
http://dx.doi.org/10.1021%2Facs.macromol.6b02108
- Author:
- Agnelli, Silvia; Pandini, Stefano; Serafini, Andrea; Musto, Sara; Galimberti, Maurizio
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8686-8696
- ISSN:
- 1520-5835
- Subject:
- anisotropy; carbon nanotubes; compression molding; energy; isotropy; mechanical properties; mixing; polymer nanocomposites; transmission electron microscopy
- Abstract:
- ... This work shows the remarkable anisotropic nonlinear mechanical behavior of nanocomposites based on carbon nanotubes and poly(1,4-cis-isoprene), prepared by mechanical mixing, calendering, and compression molding. The dynamic-mechanical moduli were measured as a function of the applied strain and along specific directions. The specimens revealed, at all filler contents, an orthotropic and transver ...
- DOI:
- 10.1021/acs.macromol.6b01682
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01682
- Author:
- Yoon, Won Sik; Kim, Dong Won; Park, Jun-Mo; Cho, Illhun; Kwon, Oh Kyu; Whang, Dong Ryeol; Kim, Jin Hong; Park, Jung-Hwa; Park, Soo Young
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8489-8497
- ISSN:
- 1520-5835
- Subject:
- absorption; electrochemistry; energy; polymers; solar cells
- Abstract:
- ... A novel electron-accepting bis-lactam building block, 3,7-dithiophen-2-yl-1,5-dialkyl-1,5-naphthyridine-2,6-dione (NTDT), and a conjugated polymer P(NTDT-BDT) comprising NTDT as an electron acceptor and benzo[1,2-b:4,5-b′]dithiophene (BDT) as an electron donor are designed and synthesized for producing efficient organic solar cells. The thermal, electronic, photophysical, electrochemical, and stru ...
- DOI:
- 10.1021/acs.macromol.6b01680
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01680
- Author:
- Korolovych, Volodymyr
F.; Ledin, Petr A.; Stryutsky, Alexandr; Shevchenko, Valery V.; Sobko, Oleh; Xu, Weinan; Bulavin, Leonid A.; Tsukruk, Vladimir V.
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8697-8710
- ISSN:
- 1520-5835
- Subject:
- aggregation behavior; hydrophilicity; hydrophobicity; ionic liquids; ionic strength; ionization; micelles; neutralization; pH; polyesters; triazoles
- Abstract:
- ... We demonstrated the assembly of amphiphilic hyperbranched protic ionic liquids (HBP-ILs) based on aliphatic hyperbranched polyester (HBP) in aqueous media in a wide range of pH and ionic conditions. The series of new branched polyionic liquids with different terminal groups, HBP-ILs, was synthesized by neutralization of carboxylic and sulfonic terminal acid groups of hypebranched core with N-methy ...
- DOI:
- 10.1021/acs.macromol.6b01562
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01562
- Author:
- Liu, Jie; Wang, Sheng; Tang, Zhenghai; Huang, Jing; Guo, Baochun; Huang, Guangsu
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8593-8604
- ISSN:
- 1520-5835
- Subject:
- alkenes; cracking; crosslinking; crystallization; energy; extensibility; hydrogen bonding; mechanical properties
- Abstract:
- ... The development of advanced elastomers with a combination of high strength, large extensibility, and excellent flex-cracking resistance is a huge challenge. In this contribution, we proposed a novel strategy to engineer a multinetwork by incorporating weaker sacrificial hydrogen bonds and stronger Zn-based units into a chemically cross-linked cis-1,4-polyisoprene network. The dynamic nature allows ...
- DOI:
- 10.1021/acs.macromol.6b01576
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01576
- Author:
- Zhulina, Ekaterina
B.; Leermakers, Frans A. M.; Borisov, Oleg V.
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8758-8767
- ISSN:
- 1520-5835
- Subject:
- analytical methods; lubricants; models; polymers; prediction
- Abstract:
- ... We present a theory describing structural properties of brushes formed by cycled macromolecules tethered to planar surface. Diverse architectures of macromolecules that differ with respect to position and number of subchains in macrocycle are considered. We use the self-consistent field analytical approach based on strong stretching approximation and assumption of Gaussian elasticity of brush-form ...
- DOI:
- 10.1021/acs.macromol.6b01275
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01275
- Author:
- Schubert, Christian; Osterwinter, Carina; Tonhauser, Christoph; Schömer, Martina; Wilms, Daniel; Frey, Holger; Friedrich, Christian
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8722-8737
- ISSN:
- 1520-5835
- Subject:
- hydrogen bonding; melting; molecular weight; polymers; rheology; stickiness; topology; viscoelasticity; viscosity
- Abstract:
- ... Melt rheology and thermal phase transition of a series of hyperbranched polyglycerol samples (hbPG) (DB ≈ 60%) in a broad molecular weight range (Mₙ = 600–440 000 g/mol) were investigated and correlated to both molecular weight and nature of the end group (hydroxyl vs permethylated and trimethylsilylated). The well-characterized and defined flexible polyethers are particularly suitable to shed lig ...
- DOI:
- 10.1021/acs.macromol.6b00674
-
http://dx.doi.org/10.1021%2Facs.macromol.6b00674
- Author:
- Ziebarth, Jesse
D.; Gardiner, Abigail Anne; Wang, Yongmei; Jeong, Youncheol; Ahn, Junyoung; Jin, Ye; Chang, Taihyun
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8780-8788
- ISSN:
- 1520-5835
- Subject:
- Monte Carlo method; adsorption; computer simulation; liquid chromatography; molecular weight; polystyrenes; silica; temperature
- Abstract:
- ... The critical adsorption points (CAP) for ring and linear polymers are determined and compared using Monte Carlo simulations and liquid chromatography experiments. The CAP is defined as the coelution point of ring or linear polymers with different molecular weights (MW). Computational studies show that the temperature at the CAP, TCAP, for rings is higher than TCAP for linear polymers regardless of ...
- DOI:
- 10.1021/acs.macromol.6b01925
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01925
- Author:
- Hebbeker, Pascal; Steinschulte, Alexander
A.; Schneider, Sabine; Okuda, Jun; Möller, Martin; Plamper, Felix A.; Schneider, Stefanie
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8748-8757
- ISSN:
- 1520-5835
- Subject:
- Monte Carlo method; composite polymers; fluorescence; fluorescence emission spectroscopy; fluorescent dyes; models; propylene oxide; topology
- Abstract:
- ... The intramolecular complex formation occurring in miktoarm star polymers and block copolymers is investigated experimentally and by means of Monte Carlo simulations. The driving force of the complex formation is an attractive interaction between the different blocks. In the simulations, a simple bead–spring model with an attractive Lennard-Jones potential is used to mimic the complexation. The eff ...
- DOI:
- 10.1021/acs.macromol.6b01786
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01786
- Author:
- Kremer, Tomislav; Kovačević, Davor; Salopek, Jasmina; Požar, Josip
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8672-8685
- ISSN:
- 1520-5835
- Subject:
- calorimetry; cations; flocculation; neutralization; pH; polymers
- Abstract:
- ... Complexation between poly(acrylate) (PA) and poly(allylammonium) (PAH) macroions at pH = 7.0 was studied by means of electrokinetics, microcalorimetry, and DLS. At low polyelectrolyte concentrations and no electrolyte present strong overcharging of primary nanocomplexes occurred. In contrast, the increase in polyelectrolyte concentration led to flocculation taking place near the equivalence. The n ...
- DOI:
- 10.1021/acs.macromol.6b01892
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01892
- Author:
- Shimomoto, Hiroaki; Kikuchi, Misaki; Aoyama, Junya; Sakayoshi, Dai; Itoh, Tomomichi; Ihara, Eiji
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8459-8465
- ISSN:
- 1520-5835
- Subject:
- glass transition temperature; matrix-assisted laser desorption-ionization mass spectrometry; polymers
- Abstract:
- ... Cyclopolymerization of bis(diazocarbonyl) compounds is described for the first time. By choosing appropriate reaction conditions and monomer structures, the cyclopolymerization of bis(diazoacetate)s efficiently proceeded to give carbon–carbon main chain cyclopolymers with well-defined structures, as confirmed by MALDI-TOF-MS analyses. The products are a new kind of cyclopolymer with respect to pol ...
- DOI:
- 10.1021/acs.macromol.6b01809
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01809
- Author:
- Hofmann, M.; Kresse, B.; Heymann, L.; Privalov, A. F.; Willner, L.; Fatkullin, N.; Aksel, N.; Fujara, F.; Rössler, E. A.
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8622-8632
- ISSN:
- 1520-5835
- Subject:
- isotope dilution technique; melting; models; molecular weight; nuclear magnetic resonance spectroscopy; polymers; temperature; variance
- Abstract:
- ... The dynamics of melts of linear poly(ethylene-alt-propylene) (PEP) of different molar masses (M) is investigated by ¹H field-cycling (FC) NMR relaxometry. Employing a commercial and a home-built relaxometer the spin-lattice relaxation rate R₁(ω) is measured in the frequency range of 200 Hz to 30 MHz and the temperature range of 200–400 K. Transforming the FC NMR relaxation data to the susceptibili ...
- DOI:
- 10.1021/acs.macromol.6b01906
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01906
- Author:
- Mariani, Giacomo; Schweins, Ralf; Gröhn, Franziska
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8661-8671
- ISSN:
- 1520-5835
- Subject:
- dendrimers; dyes; electrolytes; electrostatic interactions; ionic strength; models; nanoparticles
- Abstract:
- ... The fundamental understanding of the driving forces in electrostatic self-assembly is highly desirable for the design of novel systems and of more effective synthesis strategies. The focus of this study is the effects of the electrostatic interaction on supramolecular self-assembled nanoparticles formed by cationic dendrimers as model polyelectrolytes and oppositely charged di- and trivalent dyes, ...
- DOI:
- 10.1021/acs.macromol.6b00565
-
http://dx.doi.org/10.1021%2Facs.macromol.6b00565
- Author:
- Zhang, Quanxuan; Molenda, Monika; Reineke, Theresa M.
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8397-8406
- ISSN:
- 1520-5835
- Subject:
- adhesion; anhydrides; beta-cyclodextrin; biodegradability; biological resistance; carboxylic acids; crosslinking; epoxides; feedstocks; glass transition temperature; hydrolysis; modulus of elasticity; moieties; polymers; resins; shrinkage; strength (mechanics); thermal stability; trehalose; water solubility
- Abstract:
- ... Epoxy resins are ubiquitous in high-performance composite applications because of their excellent mechanical strength, thermal and chemical resistance, strong adhesion, and low shrinkage after curing. Bio-based epoxy resins derived from natural products such as carbohydrates offer tremendous potential for creating new polymeric materials. Sugars and their derivatives often offer great biodegradabi ...
- DOI:
- 10.1021/acs.macromol.6b01861
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01861
- Author:
- Kockler, Katrin
B.; Fleischhaker, Friederike; Barner-Kowollik, Christopher
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8572-8580
- ISSN:
- 1520-5835
- Subject:
- esters; free radicals; gel chromatography; polymethylmethacrylate
- Abstract:
- ... Nitrogen-containing methacrylates are a highly interesting class of monomers, yet only very limited data exist describing their propagation rate coefficients, kₚ. Herein, we investigate the propagation behavior of three N-containing monomers, namely 2-(N,N-diethylamino)ethyl methacrylate (DEAEMA), 2-(N,N-dimethylamino)ethyl methacrylate (DMAEMA), and 3-(N,N-dimethylamino)propyl methacrylate (DMAPM ...
- DOI:
- 10.1021/acs.macromol.6b01957
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01957
- Author:
- Yan, Liang; Cui, Xiaolin; Harada, Takaaki; Lincoln, Stephen F.; Dai, Sheng; Kee, Tak W.
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8530-8539
- ISSN:
- 1520-5835
- Subject:
- adverse effects; fluorescence; fluorescent dyes; hydrophobicity; image analysis; ionic strength; moieties; nanoparticles; phosphates; photostability; polymers; spectroscopy; stabilizers; toxicity
- Abstract:
- ... Conjugated polymer nanoparticles hold promise as fluorescence imaging agents because of their high brightness and photostability. However, their aggregation and precipitation at the high ionic strengths in physiological conditions present an impediment to their applications in biological imaging. In this study, hydrophobic linear alkyl group substituted poly(acrylate)s, PAACn, are synthesized and ...
- DOI:
- 10.1021/acs.macromol.6b02002
-
http://dx.doi.org/10.1021%2Facs.macromol.6b02002
- Author:
- Wang, Po-I; Tsai, Chou-Yi; Hsiao, Yung-Jou; Jiang, Jyh-Chiang; Liaw, Der-Jang
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8520-8529
- ISSN:
- 1520-5835
- Subject:
- carbon monoxide; carbon nanotubes; energy; molecular models; optical isomerism; polymers; toluene
- Abstract:
- ... A new approach for polytriarylamine (PTAA)-assisted selective dispersion for single-walled carbon nanotubes (SWNTs) in a toluene solution has been developed. The triarylamine-based conjugated polymers are able to selectively wrap the SWNTs with specific chiral indices depending on their backbone structures (e.g., PTAA₁₂, PTAA₁₂-P, and PTAA₁₂-BP) and side-chain functionality (e.g., PTAA₆, PTAA₆-alt ...
- DOI:
- 10.1021/acs.macromol.6b01991
-
http://dx.doi.org/10.1021%2Facs.macromol.6b01991
- Author:
- Zhang, Zhenghe; Xue, Yudong; Zhang, Pengcheng; Müller, Axel H. E.; Zhang, Weian
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8440-8448
- ISSN:
- 1520-5835
- Subject:
- composite polymers; confocal laser scanning microscopy; copolymerization; coumarin; crosslinking; encapsulation; glutathione; hydrofluoric acid; micelles; pH; photochemotherapy; redox potential; scanning electron microscopy; toxicity; transmission electron microscopy
- Abstract:
- ... A novel amphiphilic diblock copolymer, PHEMAPOSS-b-P(DMAEMA-co-CMA), was prepared via reversible addition–fragmentation chain transfer (RAFT) polymerization, where PHEMAPOSS block was first synthesized using a methacrylate monomer based on polyhedral oligomeric silsesquioxane (HEMAPOSS), and PHEMAPOSS was further utilized to prepare the block copolymer via RAFT copolymerization of 2-(dimethylamino ...
- DOI:
- 10.1021/acs.macromol.6b02414
-
http://dx.doi.org/10.1021%2Facs.macromol.6b02414
- Author:
- Wu, Hung-Chin; Hung, Chih-Chien; Hong, Chian-Wen; Sun, Han-Sheng; Wang, Jau-Tzeng; Yamashita, Go; Higashihara, Tomoya; Chen, Wen-Chang
- Source:
- Macromolecules 2016 v.49 no.22 pp. 8540-8548
- ISSN:
- 1520-5835
- Subject:
- X-radiation; atomic force microscopy; electrical properties; films (materials); polymers; solids; tensile strength; transistors
- Abstract:
- ... Isoindigo-based conjugated polymers, PII2T-C6 and PII2T-C8, with carbosilane side chains have been designed and synthesized for stretchable electronic applications. The carbosilane side chains offerred a simple synthetic pathway to evaluate long and branched side chains in high yields and were prepared with a six or eight linear spacer plus two hexyl or octyl chains after branching. The studied po ...
- DOI:
- 10.1021/acs.macromol.6b02145
-
http://dx.doi.org/10.1021%2Facs.macromol.6b02145