Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 53 Issue 20

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. Electrosynthesis of ambipolar electrochromic polymer films from anthraquinone–triarylamine hybrids

    Sheng-Huei Hsiao and Jhe-Yong Lin

    Article first published online: 4 SEP 2015 | DOI: 10.1002/pola.27813

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    This work describes the synthesis and electrochemical properties of two electropolymerizable monomers, AQ(TPA)2 and AQ(Cz)2, featuring an interior anthraquinone (AQ) segment bridged by benzoyloxy units to terminal electroactive carbazole and diphenylamino groups. The electron-deficient AQ groups efficiently blocked the radical cations delocalization between the two triphenylamino or carbazole groups, rendering the electropolymerization of the triphenylamino or carbazole groups feasible. The electrogenerated polymer films exhibited ambipolar electrochemical processes and obvious color changes upon electro-oxidation or electro-reduction, which can be switched by potential modulation.

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    Investigation of intricate, amphiphilic crosslinked hyperbranched fluoropolymers as anti-icing coatings for extreme environments

    Jennifer S. Zigmond, Kevin A. Pollack, Sarah Smedley, Jeffery E. Raymond, Lauren A. Link, Adriana Pavía-Sanders, Michael A. Hickner and Karen L. Wooley

    Article first published online: 3 SEP 2015 | DOI: 10.1002/pola.27800

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    An array of films composed of a third-generation hyperbranched fluoropolymer crosslinked with poly(ethylene glycol) is generated and tested as an anti-icing coating. Through variation of the hydrophilic:hydrophobic component ratios and drop-casting solvent, significant reductions in the water melting transition temperatures (−5 and −27 °C for free and bound water, respectively) are achieved. The novel application of this system displays the expansion and diversity of a well-established coating that demonstrates unique water confinement and sequestration behaviors with the ability to reorganize at the surface.

  3. Single component transparent free-standing films based on polyhedral octasilicate-core dendrimers bearing carbazole terminal groups and their emission properties

    Yasuyuki Irie and Kensuke Naka

    Article first published online: 3 SEP 2015 | DOI: 10.1002/pola.27811

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    Single Component Transparent Free-Standing Films Based on Polyhedral Octasilicate-Core Dendrimers Bearing Carbazole Terminal Groups and Their Emission Properties 9H-carbazole-9-ethyl and 9H-carbazole-9-hexyl-terminated polyhedral octasilicate (OS)-core dendrimers, denoted as OS-C2-Cz and OS-C6-Cz, respectively, were prepared and studied their bulk properties. Both the dedrimers formed optical transparent coating films. In particular, the coating film of OS-C2-Cz was easily peeled off from a substrate and formed a free-standing film. Photoluminescence property revealed that the carbazole group in OS-C2-Cz is prevented the excimer formation, while the carbazole group in OS-C6-Cz formed the excimer.

  4. Continuous flow synthesis of poly(methyl methacrylate) via a light-mediated controlled radical polymerization

    Anna Melker, Brett P. Fors, Craig J. Hawker and Justin E. Poelma

    Article first published online: 29 AUG 2015 | DOI: 10.1002/pola.27765

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    Recently, the ability to control polymerizations using external stimuli such as light has gained attention. However, scaling up these reactions presents unique challenges such as shallow and uneven penetration of light through the reaction medium, effectively lowering the rate of polymerization. To circumvent these issues, a continuous flow reactor was used with special attention made to choice of tubing material, yielding 50% faster reaction rates compared to batch reactions.

  5. Polyisobutylene-based polyurethanes: VII. structure/property investigations for medical applications

    Kalman Toth, Nihan Nugay and Joseph P. Kennedy

    Article first published online: 28 AUG 2015 | DOI: 10.1002/pola.27804

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    The hydrolytic, oxidative, and metal ion oxidative resistance of PIB-based polyurethane is far superior to that of PDMS-based commercial polyurethane (Elast-Eon™ E2A), while their static mechanical properties (tensile strength and elongation) are comparable.