Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 52 Issue 19

Online ISSN: 1099-0488

Associated Title(s): Journal of Polymer Science Part A: Polymer Chemistry

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Publishes papers on the physics of polymers, including applications, theory and modeling and experiments. 2012 ISI Impact Factor: 2.221

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  1. Semi-interpenetrating polymer networks composed of diisocyanate-bridged 4-arm star-shaped l-lactide oligomers and poly(ε-caprolactone)

    Hayato Takase, Ayaka Shibita and Mitsuhiro Shibata

    Article first published online: 30 AUG 2014 | DOI: 10.1002/polb.23581

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    Semi-interpenetrating polymer networks (semi-IPNs) were prepared by the reactions of 2,4-tolylene diisocyanate (TDI) and hydroxy-terminated 4-arm star-shaped l-lactide oligomers (H4LAOn's) with different arm lengths in the presence of poly(ε-caprolactone) (PCL). The TDI-bridged H4LAOn (TH4LAOn)/PCL semi-IPN with a maximum PCL content of 50 wt % and a shorter arm length displayed much better compatibility than simple PLA/PCL blend did. Tensile toughness of all the semi-IPNs were much higher than those of the PLA/PCL blends.

  2. Crystallization and orientation of isotactic poly(propylene) in cylindrical nanopores

    Dariya K. Reid, Bridget A. Ehlinger, Lin Shao and Jodie L. Lutkenhaus

    Article first published online: 30 AUG 2014 | DOI: 10.1002/polb.23577

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    The effect of cylindrical confinement on the thermal transition and isothermal crystallization of isotactic polypropylene (iPP) is shown using the hard templating approach. As diameter decreases, crystallization becomes directed along the pore's axis and shifts from hetero- to homogeneous nucleation.

  3. Effect of chemical functionalization on the mechanical properties of polypropylene hollow fiber membranes

    Joseph V. Alexander, James W. Neely and Eric A. Grulke

    Article first published online: 28 AUG 2014 | DOI: 10.1002/polb.23572

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    Polymeric hollow fiber membranes (HFMs) are used in a variety of applications, including blood oxygenation, hemodialysis, and gas separation. Since their surface properties may not always be optimal for all of these applications, they are often modified to change the hydrophilicity, alter the electrical properties, or deposit a coating. This study evaluates the effects of common oxidizing agents on the mechanical properties of HFMs, providing a basis for the development of chemical functionalization processes.

  4. Effect of PS-b-PCL block copolymer on reaction-induced phase separation in epoxy/PEI blend

    Zonglian Xia, Weizhen Li, Jindian Ding, Ao Li and Wenjun Gan

    Article first published online: 25 AUG 2014 | DOI: 10.1002/polb.23575

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    A secondary phase separation and typical phase inverted morphology was obtained in epoxy/PEI blends after adding PS-b-PCL. The preferential location of the PS-b-PCL in the epoxy-rich phase enhanced the viscoelastic effect of epoxy/PEI system and lead to a dynamic asymmetric system between PEI and epoxy. When the diffusion of the epoxy molecule is no longer able to follow the size growth of the epoxy-rich domain, secondary phase separation takes place.

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    Giant surfactants based on molecular nanoparticles: Precise synthesis and solution self-assembly

    Xinfei Yu, Yiwen Li, Xue-Hui Dong, Kan Yue, Zhiwei Lin, Xueyan Feng, Mingjun Huang, Wen-Bin Zhang and Stephen Z. D. Cheng

    Article first published online: 25 AUG 2014 | DOI: 10.1002/polb.23571

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    Giant surfactants have emerged as a new class of self-assembling materials that capture the structural features of both small-molecule surfactants and amphiphilic block copolymers. Comprised of polymer-tethered molecular nanoparticles, they display unique self-assembled nanostructures in solution. This review summarizes recent progress on the study of giant surfactants, focusing on the design and synthesis of prototype giant surfactants, as well as their rich self-assembled morphologies in solution states.

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