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. 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.

  2. 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.

  3. Probing the early stages of thermal fractionation by successive self-nucleation and annealing performed with fast scanning chip-calorimetry

    Dario Cavallo, Arnaldo T. Lorenzo and Alejandro J. Müller

    Version of Record online: 19 JUL 2016 | DOI: 10.1002/polb.24129

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    The thermal fractionation kinetics of a linear low-density polyethylene (LLDPE) during Successive Self-Nucleation and Annealing is investigated in a previously unexplored time window (10−3−10 s), thanks to the use of chip-calorimetry. Despite the extremely short annealing period, thermal fractions are already generated, and meaningful changes in the melting points and in peak resolution also occur. The longest explored time is sufficient to achieve a fractionation comparable to that obtained in conventional DSC with fractionation time of several minutes.

  4. DOSY NMR as a tool for predicting optimal conditions for hydrogel formation: The case of a hyperbranched polyglycidol cross-linked with boronic acids

    Monika Gosecka, Mateusz Gosecki and Slawomir Kazmierski

    Version of Record online: 18 JUL 2016 | DOI: 10.1002/polb.24126

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    Diffusion Ordered Spectroscopy NMR (DOSY NMR) measurements of the diffusion coefficient of polymer in the presence of a cross-linking agent carried out for semi-diluted solutions enables the elaboration of the optimal conditions for cross-linking of hyperbranched polyglycidol with boronic cross-linkers in more concentrated systems, in the form of hydrogels. The higher the reduction of diffusion coefficient of macromolecules is, the higher the cross-linking density within hydrogel is observed on the basis of the increase in the maximum of storage modulus plateau.

  5. Variation of the strain rate during CSM nanoindentation of glassy polymers and its implication on indentation size effect

    George Z. Voyiadjis and Leila Malekmotiei

    Version of Record online: 18 JUL 2016 | DOI: 10.1002/polb.24127

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    Probing the instantaneous variations of inline image and strain rate during the continuous stiffness measurement nanoindentation on poly(methyl methacrylate) and polycarbonate samples reveals that the assumption of the constant strain rate during the whole test is not valid, and it changes drastically in the early stages of the indentation before stabilization. Moreover, although the variation of the strain rate can alter the hardness of glassy polymers, its contribution is not able to justify the observed indentation size effect.