Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 54 Issue 6

Impact Factor: 3.113

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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  1. 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

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    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.

  2. 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

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    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.

  3. 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

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    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.

  4. 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

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    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.

  5. Synthesis of well-defined polyacrylonitrile by ICARATRP with low concentrations of catalyst

    Melissa Lamson, Maciej Kopeć, Hangjun Ding, Mingjiang Zhong and Krzysztof Matyjaszewski

    Article first published online: 4 FEB 2016 | DOI: 10.1002/pola.28055

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    The polymerization of acrylonitrile by ICAR ATRP with copper catalyst loadings between 1 and 50 ppm was investigated. Polyacrylonitrile (PAN) with predefined molecular weights and low dispersities were obtained. Efficient chain extension of PAN with n-butyl acrylate (BA) was demonstrated to yield well-defined PAN-b-PBA block copolymers and confirmed high chain-end functionality of the PAN macroinitiators synthesized by ICAR ATRP.

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