Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 52 Issue 17

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. A study of the yield and post-yield behavior of syndiotactic polypropylene

    Claudia Marano, Nadia Perillo and Marta Rink

    Article first published online: 31 JUL 2014 | DOI: 10.1002/polb.23561

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    Residual and recovered strain components of the overall strain are determined from properly set up loading–unloading tensile tests performed on three syndiotactic polypropylenes. The trend of residual strain vs. overall strain shows two changes: the first occurs at a critical plastic strain irrespective of syndiotacticity and coincides with the strain value reported in literature as the onset of fibrils formation. After the second change, only plastic deformation takes place and transformation into form III seems complete.

  2. Cure kinetics modeling and thermomechanical properties of cycloaliphatic epoxy-anhydride thermosets modified with hyperstar polymers

    Alberto Belmonte, Frank Däbritz, Xavier Ramis, Angels Serra, Brigitte Voit and Xavier Fernández-Francos

    Article first published online: 28 JUL 2014 | DOI: 10.1002/polb.23555

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    Hyperstar polymers (HSPs) with aromatic hyperbranched polyester core and poly(methylmethacrylate) and poly(hydroxyethylmethacrylate) arms have been used as modifiers in cycloaliphatic epoxy-anhydride thermosets, with the purpose of enhancing their impact strength. HSPs participate in the crosslinking process due to the presence of reactive hydroxyl groups, without compromising thermal-mechanical properties or slowing down curing kinetics. The modified materials show a potential toughness enhancement produced by the formation of a nano-grained morphology.

  3. Sorption of n-Hexane in Amorphous Polystyrene

    Ashish Kadam, Thomas Karbowiak, Andree Voilley, Jean-Pierre Bellat, Olivier Vitrac and Frederic Debeaufort

    Article first published online: 25 JUL 2014 | DOI: 10.1002/polb.23557

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    The sorption of n-hexane vapors in PS at 298 K was studied by gravimetry and reached a maximum of about 12 wt % close to saturation. The sorption-desorption branches exhibited large hysteresis. The change in Tg occurring during the sorption process was taken into account for interpretation and modelling.

  4. Achieving high electric energy storage in a polymer nanocomposite at low filling ratios using a highly polarizable phthalocyanine interphase

    Jing Wang, Fangxiao Guan, Li Cui, Jilin Pan, Qing Wang and Lei Zhu

    Article first published online: 23 JUL 2014 | DOI: 10.1002/polb.23554

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    Owing to the high polarizability of a tetrameric metallophthalocyanine (TMPc) interface layer, 3-phase P(VDF-HFP)/BaTiO3@TMPc-PMMA composites exhibit high relative permittivity and thus high electric energy storage at a volume-filling ratio as low as about 5 vol %. Their relative permittivity fits well to the theoretical prediction of a 3-phase composite with a 0.20 interface ratio. Therefore, these 3-phase nanodielectrics are promising to be melt-processed into thin composite films for advanced dielectric applications.

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    Confined crystallization of polymers within anodic aluminum oxide templates

    Rose Mary Michell, Iwona Blaszczyk-Lezak, Carmen Mijangos and Alejandro J. Müller

    Article first published online: 22 JUL 2014 | DOI: 10.1002/polb.23553

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    Within nanoporous anodic aluminum oxide (AAO) templates, polymer crystallization changes upon infiltration. When perfect infiltration is achieved, crystallization only occurs at very low temperatures that are close to vitrification and the overall crystallization kinetics becomes dominated by nucleation. Hence, the kinetics of crystallization changes from order 3–4 (usual in homopolymers) to order 1. The nucleation changes from heterogeneous to surface or homogeneous nucleation, although the latter is more difficult to achieve.

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