Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 51 Issue 2

15 January 2013

Volume 51, Issue 2

Pages i–ii, 87–157

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Communications
    5. Full Papers
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      Cover Image, Volume 51, Issue 2 (pages i–ii)

      Version of Record online: 10 DEC 2012 | DOI: 10.1002/polb.23227

      Thumbnail image of graphical abstract

      Neutron scattering provides space/time resolution at the relevant length scales in soft matter. The selectivity provided by the combination of this technique with isotopic-in particular, proton/deuterium-labeling allows the isolated study of chosen molecular groups and/ or components in a system. Both features make neutron scattering a unique tool for unraveling the nature of the large variety of molecular motions taking place in polymeric materials of increasing complexity. As presented by Juan Colmenero and Arantxa Arbe on page 87, the cover illustrates in an artistic way the process of neutron scattering by a macromolecule. The different colors of the “scattered neutrons” represent different energy transfers in quasielastic events.

    2. You have free access to this content
      Cover Image, Volume 51, Issue 2 (pages i–ii)

      Version of Record online: 10 DEC 2012 | DOI: 10.1002/polb.23228

      Thumbnail image of graphical abstract

      A novel hydrogel formed from a crosslinkable trilayered polymeric micelle and a polyamine is developed for the sustained release of hydrophilic compounds. The hydrogel that is formed from the trilayered polymeric micelles possessing a vesicle-like flexible structure exhibits a higher storage modulus than the hydrogel that is formed from the bilayered polymeric micelles possessing a highly packed, hard structure. The results by Yusuke Uchida, Kengo Fukuda, and Yoshihiko Murakami on page 124 strongly demonstrate that the microscopic structural difference of crosslinkers causes a macroscopic change in the properties of resulting hydrogels.

  2. Reviews

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Communications
    5. Full Papers
    1. You have free access to this content
      Recent progress on polymer dynamics by neutron scattering: From simple polymers to complex materials (pages 87–113)

      Juan Colmenero and Arantxa Arbe

      Version of Record online: 9 OCT 2012 | DOI: 10.1002/polb.23178

      Thumbnail image of graphical abstract

      Neutron scattering provides space/time resolution at the relevant length scales in soft matter. The selectivity provided by the combination of this technique with isotopic—in particular, proton/deuterium—labeling allows the isolated study of chosen molecular groups and/or components in a system. Both features make neutron scattering a unique tool for unraveling the nature of the large variety of molecular motions taking place in polymeric materials of increasing complexity.

  3. Communications

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Communications
    5. Full Papers
    1. Electroactive organic anion-doped polypyrrole as a low cost and renewable cathode for sodium-ion batteries (pages 114–118)

      Min Zhou, Ya Xiong, Yuliang Cao, Xinping Ai and Hanxi Yang

      Version of Record online: 5 OCT 2012 | DOI: 10.1002/polb.23184

      Thumbnail image of graphical abstract

      Due to the widespread availability of sodium, Na-ion batteries are becoming attractive alternatives to Li-ion batteries for large scale electrical energy storage. In this work, a diphenylamine-4-sulfonate (DS)-doped polypyrrole (C12H10NSO3 -doped (C4H3N)n, Ppy/DS) is fabricated and electrochemical performance is measured. Doping redox-active organic anion into conducting polypyrrole leads to greatly enhanced reversible redox capacity and cycling stability, offering a new strategy for creating low cost, renewable and flexible cathodes for Na-ion batteries and other energy storage applications.

  4. Full Papers

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Communications
    5. Full Papers
    1. Thermoelectric behavior of organic thin film nanocomposites (pages 119–123)

      Gregory P. Moriarty, Sukanta De, Paul J. King, Umar Khan, Michael Via, Julia A. King, Jonathan N. Coleman and Jaime C. Grunlan

      Version of Record online: 15 OCT 2012 | DOI: 10.1002/polb.23186

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      Advances in thermoelectric polymer composites are bringing these materials closer to becoming competitive with traditional thermoelectrics. The electrical conductivity of these organic thin films can be increased with intrinsically conducting PEDOT:PSS as a stabilizer for single-walled carbon nanotubes. When the metallic conductivity of these films is combined with modest thermopower, these free-standing films exhibit relatively high power factors. Improved electrical conductivity is directly linked to improved thermoelectric efficiency.

    2. The hydrogel containing a novel vesicle-like soft crosslinker, a “trilayered” polymeric micelle, shows characteristic rheological properties (pages 124–131)

      Yusuke Uchida, Kengo Fukuda and Yoshihiko Murakami

      Version of Record online: 5 OCT 2012 | DOI: 10.1002/polb.23187

      Thumbnail image of graphical abstract

      A novel hydrogel that is formed from a crosslinkable trilayered polymeric micelle and a polyamine has been developed for the sustained release of hydrophilic compounds. This hydrogel is quite unique because the trilayered polymeric micelle acts as not only a crosslinker of the hydrogel but also a container of hydrophilic compounds. In addition, it is revealed that a microscopic structural difference of crosslinkers can induce a macroscopic change in the properties of the resulting hydrogels.

    3. Fast printing of thin, large area, ITO free electrochromics on flexible barrier foil (pages 132–136)

      Roar R. Søndergaard, Markus Hösel, Mikkel Jørgensen and Frederik C. Krebs

      Version of Record online: 9 OCT 2012 | DOI: 10.1002/polb.23189

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      Large area indium tin oxide (ITO)-free organic electrochromics are manufactured using flexographic printing of hexagonal grid structures directly on a thin barrier foil. Slot-die coating of electroactive polymers followed by lamination with electrolyte gives devices with an area of 18 cm × 18 cm, enabling full switching over the whole area. Using very fine high-conductive silver grids enables good transparency of the electrode and device switching times that are similar to corresponding ITO electrochromic devices.

    4. Conjugated polymer-functionalized graphite oxide sheets thin films for enhanced photovoltaic properties of polymer solar cells (pages 137–148)

      Rong-Ho Lee, Jian-Lun Huang and Chun-Han Chi

      Version of Record online: 28 SEP 2012 | DOI: 10.1002/polb.23180

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      Nanocarbon materials such as carbon nanotubes and graphite oxide sheets (GOSs) have large contact areas, high-aspect ratios, and good electrical conductivities. This means that the electro-optical properties of organic optoelectronic devices are often improved by incorporating them. Here, conjugated polymer-functionalized GOSs efficiently assist charge transport in polymer solar cells, enhancing charge transfer from the polymer units to the cathode. The polymer/fullerene/GOS films are structurally, thermally, optically, and electrochemically characterized, in addition to being tested in solar cells.

    5. Resonant soft x-ray scattering and reflectivity study of the phase-separated structure of thin poly(styrene-b-methyl methacrylate) films (pages 149–157)

      Cynthia F. Welch, Rex P. Hjelm, Joseph T. Mang, Marilyn E. Hawley, Debra A. Wrobleski, E. Bruce Orler and Jeffrey B. Kortright

      Version of Record online: 15 OCT 2012 | DOI: 10.1002/polb.23190

      Thumbnail image of graphical abstract

      Phase separation through self-assembly gives block copolymer thin films the properties required for specific applications, and determining both domain morphology and composition is essential. In this work, resonant x-ray scattering across the carbon K edge in specular reflection and diffuse transmission geometry is used to study structure in ultrathin films of immiscible polymer components, finding lamellae ordered largely, but not entirely, in-plane. Self-consistency between both measurements requires corrections to optical properties measured in transmission, and possible experimental and fundamental origins of this discrepancy are discussed.

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