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1. Combinatorial functionalization with bisurea‐peptides and antifouling bisurea additives of a supramolecular elastomeric biomaterial

Author:
Ippel, Bastiaan D.; Arts, Boris; Keizer, Henk M.; Dankers, Patricia Y. W.
Source:
Journal of polymer science 2019 v.57 no.24 pp. 1725-1735
ISSN:
0887-6266
Subject:
X-ray photoelectron spectroscopy; additives; atomic force microscopy; bioactive properties; biocompatible materials; cell adhesion; contact angle; films (materials); myocytes; peptides; polymers; screening; smooth muscle
Abstract:
... The bioactive additive toolbox to functionalize supramolecular elastomeric materials expands rapidly. Here we have set an explorative step toward screening of complex combinatorial functionalization with antifouling and three peptide‐containing additives in a bisurea‐based supramolecular system. Thorough investigation of surface properties of thin films with contact angle measurements, X‐ray photo ...
DOI:
10.1002/polb.24907
PubMed:
32025088
PubMed Central:
PMC6988465

2. What happens in the dark? Assessing the temporal control of photo‐mediated controlled radical polymerizations

Author:
Dolinski, Neil D.; Page, Zachariah A.; Discekici, Emre H.; Meis, David; Lee, In‐Hwan; Jones, Glen R.; Whitfield, Richard; Pan, Xiangcheng; McCarthy, Blaine G.; Shanmugam, Sivaprakash; Kottisch, Veronika; Fors, Brett P.; Boyer, Cyrille; Miyake, Garret M.; Matyjaszewski, Krzysztof; Haddleton, David M.; de Alaniz, Javier Read; Anastasaki, Athina; Hawker, Craig J.
Source:
Journal of polymer science 2019 v.57 no.3 pp. 268-273
ISSN:
0887-624X
Subject:
monitoring; nuclear magnetic resonance spectroscopy; polymerization; polymers
Abstract:
... A signature of photo‐mediated controlled polymerizations is the ability to modulate the rate of polymerization by turning the light source ‘on’ and ‘off.’ However, in many reported systems, growth can be reproducibly observed during dark periods. In this study, emerging photo‐mediated controlled radical polymerizations are evaluated with in situ ¹H NMR monitoring to assess their behavior in the da ...
DOI:
10.1002/pola.29247
PubMed:
31011240
PubMed Central:
PMC6474683

3. Antimicrobial peptide modification of biomaterials using supramolecular additives

Author:
Zaccaria, Sabrina; van Gaal, Ronald C.; Riool, Martijn; Zaat, Sebastian A. J.; Dankers, Patricia Y. W.
Source:
Journal of polymer science 2018 v.56 no.17 pp. 1926-1934
ISSN:
0887-624X
Subject:
Escherichia coli; Staphylococcus aureus; additives; anti-infective agents; antimicrobial peptides; antimicrobial properties; biobased products; biocompatible materials; carboxylic acids; circular dichroism spectroscopy; medical equipment; mixing; polymers
Abstract:
... Biomaterials based on non‐active polymers functionalized with antimicrobial agents by covalent modification or mixing are currently regarded as high potential solutions to prevent biomaterial associated infections that are major causes of biomedical device failure. Herewith a strategy is proposed in which antimicrobial materials are prepared by simply mixing‐and‐matching of ureido‐pyrimidinone (UP ...
DOI:
10.1002/pola.29078
PubMed:
30344368
PubMed Central:
PMC6175361

4. High sulfur content polymers: The effect of crosslinker structure on inverse vulcanization

Author:
Smith, Jessica A.; Wu, Xiaofeng; Berry, Neil G.; Hasell, Tom
Source:
Journal of polymer science 2018 v.56 no.16 pp. 1777-1781
ISSN:
0887-624X
Subject:
models; polymers; spectroscopy; sulfur
Abstract:
... The discovery of inverse vulcanization has allowed polymers to be made using elemental sulfur as the major component. However, until now, there has been little discussion of why seemingly similar crosslinkers result in polymers with radically different properties. Combining synthesis, spectroscopy, and modeling, this study reveals the structure–property relationships of sulfur polymers and reports ...
DOI:
10.1002/pola.29067
PubMed:
30333680
PubMed Central:
PMC6175008

5. Control of cationic nanogel PEGylation in heterogeneous ARGET ATRP emulsion polymerization with PEG macromonomers

Author:
Spencer, David S.; Luu, Bryan C.; Beckman, David W.; Peppas, Nicholas A.
Source:
Journal of polymer science 2018 v.56 no.14 pp. 1536-1544
ISSN:
0887-624X
Subject:
biodegradability; chemical bonding; crosslinking; drug carriers; emulsions; encapsulation; hydrophobicity; nanoparticles; nonionic surfactants; polymerization; polymers; thermal properties
Abstract:
... Crosslinked cationic nanoscale networks with hydrophobic cores are an environmentally robust alternative to self‐assembled polymeric drug delivery carriers with respect to therapeutic encapsulation and stability to dilution. However, the ability to tune the degree of PEG incorporated into nanogels during synthesis is more challenging. In this work, biodegradable cationic nanogels were synthesized ...
DOI:
10.1002/pola.29035
PubMed:
30906114
PubMed Central:
PMC6426315

6. Modular synthesis of polymers containing 2,5‐di(thiophenyl)‐N‐arylpyrrole

Author:
Truong, Tran N. B.; Savagatrup, Suchol; Jeon, Intak; Swager, Timothy M.
Source:
Journal of polymer science 2018 v.56 no.11 pp. 1133-1139
ISSN:
0887-624X
Subject:
polymerization; polymers; solubility; solvents; thermal stability
Abstract:
... A modular and facile route has been developed to synthesize functionalized 2,5‐di(thiophen‐2‐yl)‐1‐H‐arylpyrroles from readily available starting materials. These units are compatible with various polymerization conditions and are versatile building blocks for conjugated polymers. The polymers show high thermal stability and solubility in a number of solvents. Characterization of the polymers reve ...
DOI:
10.1002/pola.28990
PubMed:
30344367
PubMed Central:
PMC6192053

7. Salt concentration dependence of the mechanical properties of LiPF6/poly(propylene glycol) acrylate electrolyte at a graphitic carbon interface: A reactive molecular dynamics study

Author:
Verners, Osvalds; Lyulin, Alexey V.; Simone, Angelo
Source:
Journal of polymer science 2018 v.56 no.9 pp. 718-730
ISSN:
0887-6266
Subject:
Gibbs free energy; carbon electrodes; electrolytes; graphene; mechanical properties; molecular dynamics; polymers; propylene glycol; salt concentration; viscoelasticity
Abstract:
... This reactive molecular dynamics study explores the salt concentration dependence of the viscoelastic and mechanical failure properties of a poly(propylene glycol)/LiPF₆‐based solid polymer electrolyte (SPE) at a graphitic carbon electrode interface. To account for the finite‐size effect of interface‐confined SPE films, the properties of two distinct film thicknesses are compared with the respecti ...
DOI:
10.1002/polb.24584
PubMed:
29780206
PubMed Central:
PMC5947740

8. Arm‐first synthesis of star polymers with polywedge arms using ring‐opening metathesis polymerization and bifunctional crosslinkers

Author:
Learsch, Robert; Miyake, Garret M.
Source:
Journal of polymer science 2018 v.56 no.7 pp. 732-740
ISSN:
0887-624X
Subject:
molecular weight; polymerization; polymers
Abstract:
... This work presents a two‐step, one‐pot process to make star polymers with polywedge arms. In a one‐pot reaction, after the polywedge arms are synthesized, crosslinker species are added to the reaction, rapidly forming star polymers. Crosslinker species with different degrees of conformational freedom were designed and synthesized and their capacity to generate star polymers was evaluated. Mass con ...
DOI:
10.1002/pola.28946
PubMed:
30319173
PubMed Central:
PMC6181444

9. Charge transport and structure in semimetallic polymers

Author:
Rudd, Sam; Franco‐Gonzalez, Juan F.; Kumar Singh, Sandeep; Ullah Khan, Zia; Crispin, Xavier; Andreasen, Jens W.; Zozoulenko, Igor; Evans, Drew
Source:
Journal of polymer science 2018 v.56 no.1 pp. 97-104
ISSN:
0887-6266
Subject:
X-radiation; electronics; methodology; molecular dynamics; polymers
Abstract:
... Owing to changes in their chemistry and structure, polymers can be fabricated to demonstrate vastly different electrical conductivities over many orders of magnitude. At the high end of conductivity is the class of conducting polymers, which are ideal candidates for many applications in low‐cost electronics. Here, we report the influence of the nature of the doping anion at high doping levels with ...
DOI:
10.1002/polb.24530
PubMed:
29242675
PubMed Central:
PMC5725714

10. Solvent effects on the intramolecular charge transfer character of N,N‐diaryl dihydrophenazine catalysts for organocatalyzed atom transfer radical polymerization

Author:
Ryan, Matthew D.; Theriot, Jordan C.; Lim, Chern‐Hooi; Yang, Haishen; G. Lockwood, Andrew; Garrison, Nathaniel G.; Lincoln, Sarah R.; Musgrave, Charles B.; Miyake, Garret M.
Source:
Journal of polymer science 2017 v.55 no.18 pp. 3017-3027
ISSN:
0887-624X
Subject:
chemical elements; energy; photocatalysts; polymerization; polymers; solvents
Abstract:
... The nature of intramolecular charge transfer (CT) of N,N‐diaryl dihydrophenazine photocatalysts (PCs) in different solvents is explored in context of their performance in organocatalyzed atom transfer radical polymerization (O‐ATRP). PCs having a computationally predicted lowest energy excited state exhibiting CT character can operate a highly controlled O‐ATRP in a wide range of solvent polaritie ...
DOI:
10.1002/pola.28574
PubMed:
28966439
PubMed Central:
PMC5614505

11. Supramolecular polymerization of a ureidopyrimidinone‐based [2]catenane prepared via ring‐closing metathesis

Author:
Teunissen, Abraham J. P.; Berrocal, José Augusto; Corbet, Christiaan H. W. A.; Meijer, E. W.
Source:
Journal of polymer science 2017 v.55 no.18 pp. 2971-2976
ISSN:
0887-624X
Subject:
catalysts; hydrogen bonding; polymerization; polymers
Abstract:
... The synthesis and supramolecular polymerization of a ureidopyrimidinone‐based Sauvage‐type [2]catenane is reported. The monomer synthesis explores many routes using the elegant metathesis catalysts of Bob Grubbs, yielding a catenane with one ureidopyrimidinone in each cycle. The supramolecular polymer obtained features both mechanical bonds and quadruple hydrogen bonding connections. ...
DOI:
10.1002/pola.28694
PubMed:
28931969
PubMed Central:
PMC5575501

12. Toward a versatile toolbox for cucurbit[n]uril‐based supramolecular hydrogel networks through in situ polymerization

Author:
Liu, Ji; Soo Yun Tan, Cindy; Lan, Yang; Scherman, Oren A.
Source:
Journal of polymer science 2017 v.55 no.18 pp. 3105-3109
ISSN:
0887-624X
Subject:
Cucurbitaceae; biocompatible materials; electronic equipment; energy; hydrogels; hydrophilicity; polymerization; polymers; strength (mechanics)
Abstract:
... The success of exploiting cucurbit[n]uril (CB[n])‐based molecular recognition in self‐assembled systems has sparked a tremendous interest in polymer and materials chemistry. In this study, polymerization in the presence of host‐guest complexes is applied as a modular synthetic approach toward a diverse set of CB[8]‐based supramolecular hydrogels with desirable properties, such as mechanical streng ...
DOI:
10.1002/pola.28667
PubMed:
28931970
PubMed Central:
PMC5575522

13. Degradation of poly(β‐amino ester) gels in alcohols through transesterification: Method to conjugate drugs to polymer matrices

Author:
Gupta, Prachi; Lacerda, Caroline; Patil, Vinod S.; Biswal, Dipti; Wattamwar, Paritosh; Zach Hilt, J.; Dziubla, Thomas D.
Source:
Journal of polymer science 2017 v.55 no.12 pp. 2019-2026
ISSN:
0887-624X
Subject:
alcohols; drugs; gels; models; polymers; riboflavin; solvents; transesterification
Abstract:
... Poly(β amino ester) (PβAE) polymers have received growing attention in the literature, owing to their ease of synthesis, versatile co‐monomer selection, and highly tunable degradation kinetics. As such, they have shown extensive potential in many biomedical applications as well. In this work, it is demonstrated for the first time that PβAE polymers containing primary and secondary amine groups can ...
DOI:
10.1002/pola.28579
PubMed:
29398778
PubMed Central:
PMC5796417

14. Pyrene‐cored covalent organic polymers by thiophene‐based isomers, their gas adsorption, and photophysical properties

Author:
Li, Changfeng; Li, Peixian; Chen, Linjiang; Briggs, Michael E.; Liu, Ming; Chen, Kai; Shi, Xiaoxiao; Han, Deman; Ren, Shibin
Source:
Journal of polymer science 2017 v.55 no.14 pp. 2383-2389
ISSN:
0887-624X
Subject:
adsorption; carbon dioxide; isomers; polymerization; polymers
Abstract:
... Two new pyrene‐cored covalent organic polymers (COPs), CK‐COP‐1 and CK‐COP‐2, were synthesized via the one‐step polymerization of two thiophene‐based isomers, 1,3,6,8‐tetra(thiophene‐2‐yl) pyrene (L₁) and 1,3,6,8‐tetra(thiophene‐3‐yl) pyrene (L₂). The resulting pyrene‐cored COPs exhibit rather different surface areas of 54 m² g⁻¹ and 615 m²g⁻¹ for CK‐COP‐1 and CK‐COP‐2, respectively. The CO₂ uptak ...
DOI:
10.1002/pola.28627
PubMed:
28781424
PubMed Central:
PMC5518284

15. Oxygen‐mediated polymerization initiated by oltipraz‐derived thiones

Author:
Zavada, Scott R.; Furgal, Joseph C.; Wood, Nathan D.; Scott, Timothy F.
Source:
Journal of polymer science 2017 v.55 no.8 pp. 1373-1382
ISSN:
0887-624X
Subject:
chemoprevention; free radicals; oxygen; polymerization; polymers; thiols
Abstract:
... A pyrrolopyrazine‐thione derived from oltipraz, a compound that has been investigated as a chemopreventive agent, affords radicals in the presence of thiols and oxygen via a redox cycle, an attribute that suggests its suitability as an initiator for oxygen‐mediated polymerization. Here, we explore the utilization of this pyrrolopyrazine‐thione, generated in situ from a precursor, as an initiator f ...
DOI:
10.1002/pola.28507
PubMed:
28947856
PubMed Central:
PMC5609726

16. Comparison of RAFT‐derived poly(vinylpyrrolidone) verses poly(oligoethyleneglycol methacrylate) for the stabilization of glycosylated gold nanoparticles

Author:
Sze Ieong, Nga; Biggs, Caroline I.; Walker, Marc; Gibson, Matthew I.
Source:
Journal of polymer science 2017 v.55 no.7 pp. 1200-1208
ISSN:
0887-624X
Subject:
biosensors; buffers; coatings; diagnostic techniques; glycosides; glycosylation; gold; lectins; nanogold; nanoparticles; pathogens; polymerization; polymers; thiols
Abstract:
... Carbohydrates dictate many biological processes including infection by pathogens. Glycosylated polymers and nanomaterials which have increased affinity due to the cluster glycoside effect, are therefore useful tools to probe function, but also as prophylactic therapies or diagnostic tools. Here, the effect of polymer structure on the coating of gold nanoparticles is studied in the context of graft ...
DOI:
10.1002/pola.28481
PubMed:
29225417
PubMed Central:
PMC5718293

17. Ferroelectric switching and electrochemistry of pyrrole substituted trialkylbenzene‐1,3,5‐tricarboxamides

Author:
Meng, Xiao; Gorbunov, Andrey V.; Christian Roelofs, W. S.; Meskers, Stefan C. J.; Janssen, René A. J.; Kemerink, Martijn; Sijbesma, Rint P.
Source:
Journal of polymer science 2017 v.55 no.8 pp. 673-683
ISSN:
0887-6266
Subject:
absorption; bubbles; electrochemistry; electrodes; polymerization; polymers
Abstract:
... We explore a new approach to organic ferroelectric diodes using a benzene‐tricarboxamide (BTA) core connected with C10 alkyl chains to pyrrole groups, which can be polymerized to provide a semiconducting ferroelectric material. The compound possesses a columnar hexagonal liquid crystalline (LC) phase and exhibits ferroelectric switching. At low switching frequencies, an additional process occurs, ...
DOI:
10.1002/polb.24318
PubMed:
28344384
PubMed Central:
PMC5347932

18. Fluorene‐containing tetraphenylethylene molecules as lasing materials

Author:
Orofino, C.; Foucher, C.; Farrell, F.; Findlay, N. J.; Breig, B.; Kanibolotsky, A. L.; Guilhabert, B.; Vilela, F.; Laurand, N.; Dawson, M. D.; Skabara, P. J.
Source:
Journal of polymer science 2017 v.55 no.4 pp. 734-746
ISSN:
0887-624X
Subject:
energy; fluorenes; polymers
Abstract:
... A series of star‐shaped oligofluorene molecules, each containing a TPE core, have been specifically designed and produced to show effective aggregation‐induced emission (AIE). Each molecule differs either in the number of fluorene units within the arms (e.g., 1 or 4, compounds 4 and 5), or the terminal group positioned at the end of each arm (e.g., H, TMS, or TPA, compounds 4, 6, and 7). Although ...
DOI:
10.1002/pola.28421
PubMed:
28781425
PubMed Central:
PMC5516184

19. Recent approaches in designing bioadhesive materials inspired by mussel adhesive protein

Author:
Kord Forooshani, Pegah; Lee, Bruce P.
Source:
Journal of polymer science 2017 v.55 no.1 pp. 9-33
ISSN:
0887-624X
Subject:
adhesion; adhesives; amino acid sequences; antifouling agents; biomimetic materials; catechol; dihydroxyphenylalanine; drying; hydrogels; littoral zone; mussels; oxidation; polymers; proteins
Abstract:
... Marine mussels secret protein‐based adhesives, which enable them to anchor to various surfaces in a saline, intertidal zone. Mussel foot proteins (Mfps) contain a large abundance of a unique, catecholic amino acid, Dopa, in their protein sequences. Catechol offers robust and durable adhesion to various substrate surfaces and contributes to the curing of the adhesive plaques. In this article, we re ...
DOI:
10.1002/pola.28368
PubMed:
27917020
PubMed Central:
PMC5132118

20. Dynamic covalent polymers

Author:
García, Fátima; Smulders, Maarten M. J.
Source:
Journal of polymer science 2016 v.54 no.22 pp. 3551-3577
ISSN:
0887-624X
Subject:
chemical bonding; chemical structure; polymers
Abstract:
... This Highlight presents an overview of the rapidly growing field of dynamic covalent polymers. This class of polymers combines intrinsic reversibility with the robustness of covalent bonds, thus enabling formation of mechanically stable, polymer‐based materials that are responsive to external stimuli. It will be discussed how the inherent dynamic nature of the dynamic covalent bonds on the molecul ...
DOI:
10.1002/pola.28260
PubMed:
27917019
PubMed Central:
PMC5129565