Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 53 Issue 7

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. Orientation control in nanoparticle filled block copolymer cold zone annealed films

    Saumil Samant, Shimelis T. Hailu, Abdullah M. Al-Enizi, Alamgir Karim and Dharmaraj Raghavan

    Article first published online: 3 MAR 2015 | DOI: 10.1002/polb.23684

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    Addition of a low concentration (1–3 wt %) of 4-hydroxythiophenol coated cadmium sulfide semiconductor nanoparticles (NPs) leads to an orientation flip from vertical to parallel-to-substrate cylinders in zone annealed cylindrical block copolymer (c-BCP) thin films. The effect is attributed to hindering of long-range order of c-BCP by NPs, which is limited in the vertical direction by thickness. However, increasing the zone annealing sweep rate imposes a higher intensity gradient strain field, partially restoring the vertical order in NP filled films.

  2. Molecular dynamic study of dielectric polarization and ferroelectricity in a model polar polymer

    Jeffrey P. Calame

    Article first published online: 27 FEB 2015 | DOI: 10.1002/polb.23696

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    Dielectric polarization and ferroelectricity in polymers can be extremely complex phenomena. To gain a more fundamental understanding, the simplest possible generic model of a polar polymer, based on a united atom model of polyethylene endowed with artificial charges, is studied with molecular dynamics simulations. The response of an isolated lamellar crystal to electric fields is analyzed to uncover the underlying molecular mechanisms.

  3. Tuning salicylate-based polymers to overcome lag time and extend release via copolymers and polymer blends

    Leonid Garber, Neel Jingar, Roselin Rosario-Meléndez and Kathryn E. Uhrich

    Article first published online: 27 FEB 2015 | DOI: 10.1002/polb.23690

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    Poly(anhydride-ester) copolymers containing salicylic acid (SA) with adipic (AD) and diethylmalonic (DEM) linkers in varying ratios are depicted in (A) whereas the polymer blends formed by physically admixing homopolymers of SA-AD and SA-DEM are depicted in (B). As shown in the cumulative SA release curves, both copolymers (lower left) and polymer blends (lower right) reduced the SA lag time and extended release for several weeks.

  4. Influence of the interface material layers and semiconductor energetic disorder on the open circuit voltage in polymer solar cells

    Andrea Zampetti, Amir Hossein Fallahpour, Martina Dianetti, Luigi Salamandra, Francesco Santoni, Alessio Gagliardi, Matthias Auf der Maur, Francesca Brunetti, Andrea Reale, Thomas M. Brown and Aldo Di Carlo

    Article first published online: 21 FEB 2015 | DOI: 10.1002/polb.23685

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    The relationship between open-circuit voltage (VOC) and the work function (φ) of the interface layers is still a matter of debate in polymer solar cells. Simulations, together with experiments on more than 20 cell architectures based on P3HT:PC60BM, enable the analysis of the physical dependence of VOC on φ. Furthermore, by varying the Gaussian density of states (DOS), it is shown that VOC performance depends significantly also on the DOS.

  5. Formation of nanofibers in Poly(9,9-dioctylfluorene) toluene solutions during aging

    Li Xu, Jidong Zhang, Juan Peng and Feng Qiu

    Article first published online: 7 FEB 2015 | DOI: 10.1002/polb.23677

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    The formation of β-phase nanofibers of poly(9,9-dioctylfluorene) (PF8) in aged toluene solution at low temperature is reported. Their photophysical properties and rheological behaviors are linked with the solution structures. This study may offer an effective way to improve the understanding of the formation mechanism of PF8 β-phase and facilitate the ongoing exploration of using such nanofiber networks in electronic devices.

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