Journal of Polymer Science Part A: Polymer Chemistry

Cover image for Vol. 53 Issue 19

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. 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.

  2. 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.

  3. High molecular weight and low dispersity polyacrylonitrile by low temperature RAFT polymerization

    Jeremy D. Moskowitz, Brooks A. Abel, Charles L. McCormick and Jeffrey S. Wiggins

    Article first published online: 28 AUG 2015 | DOI: 10.1002/pola.27806

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    Well-controlled polymers with uniform dispersity and high molecular weight serve as excellent model precursors for further study of in situ carbon fiber production of PAN-based carbon fibers. Well-controlled high molecular weight and low dispersity polyacrylonitrile (PAN) was synthesized via reversible addition-fragmentation chain transfer (RAFT) polymerization. Through low temperature (30 °C) RAFT polymerization, chain termination and chain transfer reactions were suppressed leading to improved control, higher molecular weight PAN, and higher conversions.

  4. Effect of multiple H-bonding on the properties of polyimides containing the rigid rod groups

    Xiaoye Ma, Chuanqing Kang, Wenhui Chen, Rizhe Jin, Haiquan Guo, Xuepeng Qiu and Lianxun Gao

    Article first published online: 28 AUG 2015 | DOI: 10.1002/pola.27808

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    Five fully symmetrical diamines containing benzimidazole, benzoxazole, and hydroxyl group were synthesized and a series of polyimides were prepared by the reaction of these diamines with commercial aromatic dianhydrides. The influence on the properties of PIs by the introduction of rigid rod-like nitrogen heterocyclic structure and the formation of intra-/intermolecular H-bonding has been discussed.

  5. Radical polymerization behavior and molecular weight development of homologous monoacrylate monomers in lyotropic liquid crystal phases

    Michael A. DePierro, Céline Baguenard and C. Allan Guymon

    Article first published online: 27 AUG 2015 | DOI: 10.1002/pola.27783

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    Surfactant self-assembly can generate lyotropic liquid-crystalline mesophases such as hexagonal, bicontinuous cubic, or lamellar nanostructures. These geometries can be used as a photopolymerization template to synthesize materials with nanoscale features. Rapid radical polymerization kinetics and thermodynamics are key factors to better control nanostructure retention. Herein, monomer polarity, light intensity, and template geometry are correlated to the evolution of polymer molecular weight and radical photopolymerization kinetics to better understand the parameters that can improve the nanostructure transfer.