Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 52 Issue 21

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. Linear and four-armed poly(l-lactide)-block-poly(d-lactide) copolymers and their stereocomplexation with poly(lactide)s

    Jun Shao, Zhaohui Tang, Jingru Sun, Gao Li and Xuesi Chen

    Article first published online: 29 SEP 2014 | DOI: 10.1002/polb.23597

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    The crystallization behaviors of linear and four-armed PLLA, PLLA-b-PDLA block copolymer and PLLA-b-PDLA/PLA blends can be equated with the ancient Chinese proverb: One monk will shoulder two buckets of water (neat PLLA forms crystallites by self-congregation), two monks will share the load (PLLA-b-PDLA forms stereocomplex crystallites by the interaction between PLLA and PDLA blocks), but add a third and no one will want to fetch water (in the PLLA-b-PDLA/PLA, the formation of stereocomplex and homochiral crystallites are restricted by each other).

  2. A comparative study of jet formation in nozzle- and nozzle-less centrifugal spinning systems

    Huaizhong Xu, Huanhuan Chen, Xianglong Li, Chen Liu and Bin Yang

    Article first published online: 29 SEP 2014 | DOI: 10.1002/polb.23596

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    Nozzle-less centrifugal spinning is a promising approach for the fabrication of nanofibers with high productivity from polymer melts or solutions. In this work, mechanisms of jet formation for nozzle- and nozzle-less centrifugal spinning are investigated and compared, including finger phenomenon, critical angular velocity, initial jet velocity, and jet path. These results are beneficial for understanding the jet motion behaviors of nozzle-/nozzle-less centrifugal spinning and will contribute to the optimization of processing parameters during production of high performance nanofibers.

  3. Effects of POSS nanoparticles on glass transition temperatures of ultrathin poly(t-butyl acrylate) films and bulk blends

    Ufuk Karabiyik, Rituparna Paul, Michael C. Swift, Sushil K. Satija and Alan R. Esker

    Article first published online: 29 SEP 2014 | DOI: 10.1002/polb.23603

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    Thermal transitions with a focus on glass transition temperatures (Tg) for thin films of polymer blends are investigated. Amphiphilic polyhedral oligomeric silsesquioxane (POSS) and poly(t-butyl acrylate) (PtBA) are used as model systems for the formation of Langmuir–Blodgett films. Thin films of pure relatively high and low molar mass PtBA used in this study have surface Tg values that are smaller compared to bulk values. The addition of POSS to PtBA leads to an enhancement of both bulk and surface Tg.

  4. Area-selective microwrinkle formation on poly(dimethylsiloxane) by treatment with strong acid

    Masashi Watanabe and Ryoma Hashimoto

    Article first published online: 25 SEP 2014 | DOI: 10.1002/polb.23599

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    Formation of microwrinkles is studied because surface topographies in a micrometer scale potentially have various functions. In this work, microwrinkles are formed on a poly(dimethylsiloxane) film by treating it with an acid mixture (concentrated sulfuric and nitric acids) at 80 °C followed by a water rinsing step. The rinsing condition determines the appearance of the wrinkles. In addition, the wrinkles can be formed in specific areas of the poly(dimethylsiloxane) surfaces using a small piece of filter paper wetted with water.

  5. Application of a micro/macro-homogenization procedure to the investigation of the mechanical behavior of ionomer membranes for fuel cells

    Thibaut Colinart, Jean-Christophe Perrin and Christian Moyne

    Article first published online: 24 SEP 2014 | DOI: 10.1002/polb.23589

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    During the assembly and operation of a fuel cell unit, numerous mechanical stresses on the membrane arise from compression, swelling/shrinking, and other harsh operating conditions. Understanding the swelling behavior of the membrane is highly relevant from a fundamental perspective. In this work, the periodic homogenization technique is used to extend the physics from the nanoscale to the microscale in a Nafion membrane used in proton exchange membrane fuel cells under mechanical stresses.