Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 54 Issue 6

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. 2014 ISI Impact Factor: 3.830.

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  1. Recovery stress and work output in hyperbranched poly(ethyleneimine)-modified shape-memory epoxy polymers

    David Santiago, Albert Fabregat-Sanjuan, Francesc Ferrando and Silvia De la Flor

    Article first published online: 3 FEB 2016 | DOI: 10.1002/polb.24004

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    Hyperbranched-modified shape-memory epoxy polymers are studied in order to determine their potential use as thermomechanical actuators. Shape memory effect is analysed under fully and partially constrained conditions to evaluate the recovery stress and mechanical work generated. Results revealed rapid recovery stress generation, very high recovery stresses (up to 7 MPa) and extremely high work densities (up to 750 kJ/m3). The network structure of shape-memory polymers was found to be a key factor for actuator-like applications.

  2. Molecular dynamics simulations of cation-controlled aggregation in fluorene–triarylamine copolymers

    Meilin Li and Stefan Adams

    Article first published online: 3 FEB 2016 | DOI: 10.1002/polb.23998

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    Molecular dynamics simulations of sulfonated fluorene–triarylamine hole conductor polymers containing a wide range of monovalent cations show that the variation in the degree of cation clustering with cation size controls polymer morphology, cation mobility and the time evolution of the energy landscape for charge transport. The resulting MD trajectories for each BAFS–cation system are analyzed with respect to the influence of the cation type on the ionic aggregation and related structural features that may affect the conduction mechanism.

  3. Phase separation in dilute polymer solutions at high-rate extension

    Andrey V. Subbotin and Alexander N. Semenov

    Article first published online: 3 FEB 2016 | DOI: 10.1002/polb.24005

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    Flow-induced demixing in polymer solutions is a widely known phenomenon observed both in shear and extension flows, particularly high-rate uniaxial extension of polymer solutions often accompanied by decomposition of polymeric filament from the solvent. We study the phase separation in polymer solutions under extension flow arisen above the coil to stretched coil transition. Based on the free energy analysis we show that the flow-induced orientation of polymer segments can drastically reduce the energy of their steric repulsion. As a result attraction between the chains gains more importance, and this effect leads to segregation of polymer from the solvent if the strain rate exceeds some critical value.

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    A review of shape memory polymers bearing reversible binding groups

    Christopher L. Lewis and Elizabeth M. Dell

    Article first published online: 1 FEB 2016 | DOI: 10.1002/polb.23994

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    Reversible binding groups (RBGs) can be strategically used to engineer shape memory polymers (SMPs) with new and exciting properties. SMPs bearing both supramolecular and dynamic covalent RBGs will be reviewed with an emphasis on hydrogen bonding, ionic interactions, metal–ligand coordination, and dynamic covalent exchange and addition reactions.

  5. Effects of amorphous poly(3-hexylthiophene) on active-layer structure and solar cells performance

    Chung-Hao Liu, Wei-Hsuan Tseng, Chih-Yang Cheng, Chih-I Wu, Pi-Tai Chou and Shih-Huang Tung

    Article first published online: 30 JAN 2016 | DOI: 10.1002/polb.23999

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    For bulk heterojunction polymer/fullerene solar cells, it has been known that high polymer crystallinity that facilitates the charge carrier transport through the route of π-π stacking is crucial for achieving a high power conversion efficiency. This work emphasizes the importance of amorphous phase and demonstrates that a small amount of amorphous regiorandom P3HT can retard the phase separation between P3HT and PCBM, thus leading to an improvement of solar cell stability.