Journal of Polymer Science Part A: Polymer Chemistry
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ISI Journal Citation Reports © Ranking: 2014: 18/82 (Polymer Science)
Online ISSN: 1099-0518
Associated Title(s): Journal of Polymer Science Part B: Polymer Physics
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- Tough photopolymers based on vinyl esters for biomedical applications
Andreas Mautner, Barbara Steinbauer, Sandra Orman, Günter Russmüller, Karin Macfelda, Thomas Koch, Jürgen Stampfl and Robert Liska
Article first published online: 9 FEB 2016 | DOI: 10.1002/pola.28065
Vinyl esters are versatile alternatives to (meth)acrylates in biomedical applications due to low toxicity and unproblematic degradation products. Unfortunately, their limited mechanical properties, especially their brittleness, are a shortcoming so far. To improve mechanical properties via the introduction of certain functional groups, we have developed a new synthesis route to vinyl esters and synthesized new types of these monomer class, which upon polymerization give polymers with significantly improved impact strength.
- Copolymerization of carbon dioxide and cyclohexene oxide catalyzed by chromium complexes bearing semirigid [ONSO]-type ligands
Bing Han, Li Zhang, Samuel J. Kyran, Binyuan Liu, Zhongyu Duan and Donald J. Darensbourg
Article first published online: 8 FEB 2016 | DOI: 10.1002/pola.28052
Imine-thioether-bridged bis(phenolate) chromium complexes, the softer analogs to (salalen)CrIII catalysts, were employed in the copolymerization of CO2 and cyclohexene oxide to produce poly(cyclohexene carbonate). Their activity can be enhanced by the use of electron-withdrawing groups on the ligand.
- The synthesis and photoactive properties of cyclic amphiphilic polymers with azobenzene in main chain
Ganquan Jiang, Lishan Li, Xiaofei Xu, Jinjie Lu, Xing Zhu, Zhengbiao Zhang, Nianchen Zhou and Xiulin Zhu
Article first published online: 8 FEB 2016 | DOI: 10.1002/pola.28045
Cyclic amphiphilic polymers with azobenzene in main chain, cyclic-Azo-TEG-PS were successfully prepared by ATRP and CuAAC “click” cyclization from α-TMS-alkyne-ω-azido linear precursors. The cyclic polymers displayed a higher Tg than that of the linear ones. The trans-to-cis and cis-to-trans photoisomerization of cyclic polymers was both slower than that of their respective linear counterparts with the azobenzene moiety at chain end.
- Fluorinated star-shaped block copolymers: Synthesis and optical properties
Jing Qu, Xinran Luo and Zhonggang Wang
Article first published online: 8 FEB 2016 | DOI: 10.1002/pola.28056
Wholly aromatic ATRP initiator tetrakis(4-(1-bromoethyl)phenyl)silane is synthesized, which successively initiates the atom transfer radical polymerizations of MMA and fluorinated monomer (FGOA) to create fluorinated star-shaped block copolymers PMMA-b-poly(FGOA)s in controlled manner with the polydispersity indices less than 1.30. The fluorinated films exhibit excellent hydrophobicity, tunable refractive indices and extremely low birefringence coefficients, showing potential application in optical waveguide devices.
- 2,2,2-trifluoroacetophenone-based D-π-A type photoinitiators for radical and cationic photopolymerizations under near-UV and visible LEDs
Ming Jin, Man Yu, Yuan Zhang, Decheng Wan and Hongting Pu
Article first published online: 5 FEB 2016 | DOI: 10.1002/pola.28053
Two novel D-π-A type trifluoroacetophenone-based photoinitiators having a biphenyl or fluorenyl conjugated systems were synthesized by Suzuki reactions. The obtained photoinitiators exhibited high UV-Visible light sensitivity. Furthermore, two photoinitiators were soluble in common monomers of acrylate and epoxides. These results improved their applications in the radical and cationic photopolymerizations at 365 to 450 nm LEDs light sources even in low concentration initiators and weak exposure intensity, e.g., 1 to 2 mW cm−2.