Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 51 Issue 22

15 November 2013

Volume 51, Issue 22

Pages i–ii, 1593–1656

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Communication
    4. Full Papers
    5. Erratum
    1. You have free access to this content
      Cover Image, Volume 51, Issue 22 (pages i–ii)

      Article first published online: 7 OCT 2013 | DOI: 10.1002/polb.23392

      Thumbnail image of graphical abstract

      Polymer electrolyte membrane fuel cells are a clean and efficient power source for electronic vehicles and portable devices; alkaline anion exchange membrane fuel cells (AEMFCs) avoid the use of expensive platinum as needed for their proton counterparts. In the work by Zhi Liu, Xiuling Zhu, Guangfu Wang, Xixin Hou, and Dezhi Liu on page 1632, crosslinked AEMs based on poly(phthalazinone ether ketone) are prepared. The AEM's ion exchange capacity, swelling ratio, water uptake, thermal resistance, and high ionic conductivity are demonstrated for potential application in AEMFCs.

  2. Communication

    1. Top of page
    2. Cover Image
    3. Communication
    4. Full Papers
    5. Erratum
    1. Correlation of Activation Energies of Gas Diffusivity and Local Matrix Mobility in Polycarbonate/POSS Nanocomposites (pages 1593–1597)

      Martin Böhning, Ning Hao and Andreas Schönhals

      Article first published online: 30 SEP 2013 | DOI: 10.1002/polb.23381

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      A direct correlation between penetrant diffusion and molecular motions of the polymeric matrix is established for the first time in terms of the corresponding activation energies. Combining broadband dielectric relaxation spectroscopy (BDS) and time-lag gas permeation measurements activation energies for both, the β-relaxation of the polymeric matrix (EA) and the penetrant diffusion (ED) are obtained. The systematic variation of the β-relaxation was achieved by varying the content of Phenethyl-POSS as nanoscaled filler.

  3. Full Papers

    1. Top of page
    2. Cover Image
    3. Communication
    4. Full Papers
    5. Erratum
    1. Heat-Induced Supramolecular Organogels Composed of α-Cyclodextrin and “Jellyfish-Like” β-Cyclodextrin–Poly(ε-caprolactone) (pages 1598–1606)

      Ya-Kun Li, Ming-Wei Jiang, Liang Wang, Cheng-Gong Guo, Youqian Xu and Cai-Qi Wang

      Article first published online: 9 SEP 2013 | DOI: 10.1002/polb.23372

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      While there have been a large number of reports on gelation between poly(ε-caprolactone) (PCL) derivatives and CDs, hydrogels are more commonly reported than organogels. A heat-induced organogel is obtained by multi-arm polymer β-CD-PCL with a unique “jellyfish-like” structure and α-CD in DMF. SEM images reveal the tendency of the organogel to form a novel topological helix porous structure. This research may provide a new method to construct supramolecular organogels with the potential for new functional biomaterials.

    2. Synthesis, Morphological Structures, and Material Characterization of Electrospun PLA:PCL/Magnetic Nanoparticle Composites for Drug Delivery (pages 1607–1617)

      Hazim J. Haroosh, Yu Dong and Gordon D. Ingram

      Article first published online: 10 SEP 2013 | DOI: 10.1002/polb.23374

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      Loading drugs into electrospun nanofiber mats is an efficient way of encapsulating them; the fibers' structural stability aids drug delivery. Drug release from a fiber mat can be controlled by altering fiber morphology, polymer composition, and drug loading method. Here, a novel electrospun hybrid composite material is made by adding magnetic nanoparticles to poly(lactic acid):poly(caprolactone) blends, to create a new system that enables directed drug release to a targeted body area using external magnetic fields.

    3. Structure Evolution upon Uniaxial Drawing Skin- and Core-Layers of Injection-Molded Isotactic Polypropylene by In Situ Synchrotron X-ray Scattering (pages 1618–1631)

      Yanhui Chen, Ganji Zhong, Benjamin S. Hsiao and Zhongming Li

      Article first published online: 12 SEP 2013 | DOI: 10.1002/polb.23376

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      There are few studies on the deformation behavior of injection-molded products, and even fewer that investigate the hierarchic structure evolution of injection-molded parts. In this work, simultaneous with mechanical testing, the tensile deformation behavior of the separate skin and core layers was probed by in situ synchrotron X-ray scattering under different tensile temperatures. Their tensile deformation mechanism is further evaluated. This work elucidates the origin of inner stress, laying a theoretical foundation for achieving high performance of injection-molded parts.

    4. Novel Crosslinked Alkaline Exchange Membranes Based on Poly(phthalazinone ether ketone) for Anion Exchange Membrane Fuel Cell Applications (pages 1632–1638)

      Zhi Liu, Xiuling Zhu, Guangfu Wang, Xixin Hou and Dezhi Liu

      Article first published online: 12 SEP 2013 | DOI: 10.1002/polb.23377

      Thumbnail image of graphical abstract

      Polymer electrolyte membrane fuel cells are a clean and efficient power source for electronic vehicles and portable devices; alkaline anion exchange membrane fuel cells (AEMFCs) avoid the use of expensive platinum as needed for their proton counterparts. In this work, crosslinked AEMs based on poly(phthalazinone ether ketone) were prepared. The AEM's ion exchange capacity, swelling ratio, water uptake, thermal resistance, and high ionic conductivity were demonstrated for potential application in AEMFCs.

    5. Extremely Stable Copper–Polymelamine Composite Material for Amperometric Hydrogen Peroxide Sensing (pages 1639–1646)

      Selvaraj Baskar, Jen-Lin Chang and Jyh-Myng Zen

      Article first published online: 24 SEP 2013 | DOI: 10.1002/polb.23378

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      Monitoring hydrogen peroxide levels is important in food and clinical analysis as enzymatic H2O2 production occurs in biological systems. Reported here is a stable H2O2 amperometric sensor based on a copper electrodeposited, poly(melamine)-modified screen-printed carbon electrode. The preparation is a simple two-step process without the use of harmful and environmentally toxic chemicals, which are typically used in conventional chemical reduction methods to prepare complicated structural copper materials.

    6. Swelling of Ultrathin Molecular Layer-by-Layer Polyamide Water Desalination Membranes (pages 1647–1655)

      Edwin P. Chan, Allison P. Young, Jung-Hyun Lee and Christopher M. Stafford

      Article first published online: 30 SEP 2013 | DOI: 10.1002/polb.23380

      Thumbnail image of graphical abstract

      The water swelling behavior of crosslinked aromatic polyamide ultrathin films are characterized using specular X-ray reflectivity. The network parameters of these polyamides are quantified by applying the Flory-Rehner and the Painter-Shenoy thermodynamic swelling models that relate the change in swelling ratio to water activity. Comparing these results with chemical analysis suggest that the Painter-Shenoy model, developed based on the disinterspersion concept, is more appropriate in describing the swelling behavior of polymer networks with low network functionality.

  4. Erratum

    1. Top of page
    2. Cover Image
    3. Communication
    4. Full Papers
    5. Erratum
    1. You have free access to this content
      Erratum: Cover Image, Volume 51, Issue 18 (page 1656)

      Article first published online: 10 SEP 2013 | DOI: 10.1002/polb.23379

      This article corrects:

      Cover Image, Volume 51, Issue 18

      Vol. 51, Issue 18, i–ii, Article first published online: 5 AUG 2013

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