Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 54 Issue 17

Online ISSN: 1099-0488

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

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J. Polym. Sci. B Polym. Phys. publishes papers on the physics of polymers, including applications, theory and modeling, and experiments. 2015 ISI Impact Factor: 3.318.

Recently Published Articles

  1. Impact of cellulose nanocrystal aspect ratio on crystallization and reinforcement of poly(butylene adipate-co-terephthalate)

    Marcos Mariano, Christine Chirat, Nadia El Kissi and Alain Dufresne

    Version of Record online: 28 JUL 2016 | DOI: 10.1002/polb.24139

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    Dimensions of cellulose nanocrystals (CNCs) have a stronger impact on the crystallinity of the matrix and mechanical stiffness of the nanocomposite than its volume fraction. A comparison between rheological tests performed in the molten state of the matrix and mechanical test carried out at room temperature suggests that the observed mechanical reinforcing effect is mostly caused by the CNC-induced crystallinity of the poly(butylene adipate-co-terephthalate) (PBAT) matrix.

  2. Negative thermal expansion of poly(vinylidene fluoride) and polyethylene tie molecules: A molecular dynamics study

    Charlie Ray Wand and Kim Bolton

    Version of Record online: 25 JUL 2016 | DOI: 10.1002/polb.24131

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    We perform molecular dynamics simulations of tie molecules, polymer chains linking two crystalline regions, and identify two molecular level mechanisms for actuation in poly(vinylidene fluoride) (PVDF) and polyethylene. An entropically driven mechanism is observed for all flexible polymers at low applied forces. A second mechanism due to conformational change is observed at intermediate applied forces for PVDF.

  3. Universal power law behavior of the AC conductivity versus frequency of agglomerate morphologies in conductive carbon nanotube-reinforced epoxy networks

    Brian M. Greenhoe, Mohammad K. Hassan, Jeffrey S. Wiggins and Kenneth A. Mauritz

    Version of Record online: 25 JUL 2016 | DOI: 10.1002/polb.24121

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    Electrical conductivity σ vs. frequency ω for a composite consisting of agglomerated multiwalled carbon nanotubes dispersed throughout a cured epoxy matrix was discovered to follow the empirical universal dynamic response equation of Jonscher. The frequency behavior of the exponent n is discussed in terms of underlying morphology throughout which charge carriers migrate.

  4. Effect of molecular weight in diketopyrrolopyrrole-based polymers in transistor and photovoltaic applications

    Andrea Gasperini, Xavier A. Jeanbourquin and Kevin Sivula

    Version of Record online: 22 JUL 2016 | DOI: 10.1002/polb.24135

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    While much is now known regarding the effects of Mn and ĐM on rr-P3HT and PBTTT, much less is known about the new class of donor–acceptor type polymers synthesized using step-growth techniques. The use of preparatory size exclusion chromatography affords precise separation of rigid DPP-based polymers into fractions with low dispersity. These fractions reveal a large effect on the performance metrics understood through the investigation of morphology and crystallinity in the thin-film devices.

  5. Investigation of perfluorosulfonic acid ionomer solutions by 19f NMR and DLS: Establishment of an accurate quantification protocol

    Assma El Kaddouri, Lara Perrin, Bruno Jean, Lionel Flandin and Corine Bas

    Version of Record online: 19 JUL 2016 | DOI: 10.1002/polb.24130

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    A long perfluorosulfonic acid (PFSA) side chain was used as a proton exchange membrane for a fuel cell application undergoing chemical degradation. NMR spectroscopy could be one powerful technique to quantify degradation though PFSA and derivate products released during FC operation. This work proposes a suitable and new “three step” NMR protocol using signal to noise ratio, as well as showing the aggregation of PFSA impact quantification under a temperature threshold of 80°C.