Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 53 Issue 22

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. 2013 ISI Impact Factor: 3.803.

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  1. Nanostructured epoxy thermoset templated by an amphiphilic PCL-b-PES-b-PCL triblock copolymer

    Qilei Xu, Quan Zhou, Kang Shen, Deyi Jiang and Lizhong Ni

    Article first published online: 9 OCT 2015 | DOI: 10.1002/polb.23917

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    This work describes the synthesis and characterization of a PCL-b-PES-b-PCL triblock copolymer and its incorporation into a reactive (epoxy-amine) solvent. TEM and SAXS are used to characterize the nanostructuration produced during the reaction and the effect on the critical stress intensity factor of cured blends is investigated. In addition, the fracture toughness of the nanostructured thermosets was evaluated and it was found that the epoxy resin was toughened by 23.3%.

  2. Nanocomposite hydrogels: Fracture toughness and energy dissipation mechanisms

    Andrea Klein, Philip G. Whitten, Katharina Resch and Gerald Pinter

    Article first published online: 8 OCT 2015 | DOI: 10.1002/polb.23912

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    The fracture energy of poly(N,N-dimethylacrylamide)-Laponite XLS nanocomposite hydrogels was quantified by the pure shear test to be up to 6800 J m−2, the second highest reported for a hydrogel. Crack tip blunting, plastic deformation, and viscoelastic dissipation cooperate to achieve extraordinary high fracture energies.

  3. Retardation of shape change of Au nanorods using photo-cross-linkable ligands

    Scott P. O. Danielsen, Jihoon Choi and Russell J. Composto

    Article first published online: 8 OCT 2015 | DOI: 10.1002/polb.23929

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    The retardation of thermal reshaping of gold nanorods by grafting a diblock copolymer [P(S-b-S-N3)] containing an outer polystyrene (PS) brush and a short, inner photo-cross-linkable PS-azide block is reported. The P(S-b-S-N3)-Au NRs are dispersed in a PS thin film and reshaping is investigated using scanning electron microscopy and UV–Vis spectroscopy. By slowing down reshaping at elevated temperature, polymer thin film devices that heat during use can exhibit a longer lifetime.

  4. Brush polymer ion gels

    Christopher M. Bates, Alice B. Chang, Morgan W. Schulze, Nebojša Momčilović, Simon C. Jones and Robert H. Grubbs

    Article first published online: 7 OCT 2015 | DOI: 10.1002/polb.23927

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    Ion gels comprising ABA brush block copolymers and 1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([BMI][TFSI]) are reported. Structure and conductivity measurements reveal trends in gel properties as a function of block volume fraction, polymer molar mass, and concentration. Conductivities near 1 mS/cm at 25 °C and normalized conductivities 0.2 to 0.8 highlight liquid-like dynamics in the matrix phase and potentially presage future applications.

  5. Effect of the C/O ratio in graphene oxide materials on the reinforcement of epoxy-based nanocomposites

    Cristina Vallés, Fabian Beckert, Laura Burk, Rolf Mülhaupt, Robert J. Young and Ian A. Kinloch

    Article first published online: 6 OCT 2015 | DOI: 10.1002/polb.23925

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    It has been demonstrated that both graphene oxide (GO) and thermally-reduced graphene oxide (TRGO) are found to reinforce epoxy-based nanocomposites. The Young's modulus of the GO in the nanocomposites was found to be around 170 GPa and this reduced to 120 GPa for the TRGO. The addition of GO to the polymer was not found to increase the viscosity of the epoxy significantly such that the resulting materials were found to have a good combination of processability and mechanical properties.