Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 50 Issue 17

1 September 2012

Volume 50, Issue 17

Pages i–iv, 1209–1270

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Full Papers
    1. You have free access to this content
      Cover Image, Volume 50, Issue 17 (pages i–ii)

      Article first published online: 30 JUL 2012 | DOI: 10.1002/polb.23133

      Thumbnail image of graphical abstract

      The cover image shows an optical profilometry scan of a biaxially wrinkled surface consisting of two distinct wavelengths orthogonal to one another. Unique, novel wrinkle morphologies as presented by Chelsea S. Davis and Alfred J. Crosby on page 1225 are obtained by the sequential application of orthogonal compressive strains. Taking advantage of the crosslinking kinetics of the elastomeric substrate, control over the ratio of the two wrinkle wavelengths is achieved. These new surface patterns could be utilized on an industrial scale to produce functional surfaces, such as materials with tunable friction and optical properties.

    2. You have free access to this content
      Inside Cover, Volume 50, Issue 17 (pages iii–iv)

      Article first published online: 30 JUL 2012 | DOI: 10.1002/polb.23134

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      Superoleophobic surfaces have aroused worldwide interest during the past few years. These surfaces are of great significance not only for fundamental research but also for various practical applications in self-cleaning, oil-repellent coatings, and anti-bioadhesion. Polymers with their unique properties have become one of the most important parts of constructing superoleophobic materials. The Review on page 1209 by Zhongxin Xue, Mingjie Liu, and Lei Jiang presents recent developments in the design, fabrication, and application of polymeric superoleophobic surfaces both in air and in water.

  2. Reviews

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Full Papers
    1. You have free access to this content
      Recent developments in polymeric superoleophobic surfaces (pages 1209–1224)

      Zhongxin Xue, Mingjie Liu and Lei Jiang

      Article first published online: 23 JUN 2012 | DOI: 10.1002/polb.23115

      Thumbnail image of graphical abstract

      Superoleophobic surfaces have aroused worldwide interest during the past few years. These surfaces are of great significance not only for fundamental research but also for various practical applications in self-cleaning, oil repellent coating, and antibioadhesion. Polymers with their unique properties have become one of the most important parts of constructing superoleophobic materials. This article reviews recent developments in the design, fabrication, and application of polymeric superoleophobic surfaces both in air and in water.

  3. Full Papers

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Full Papers
    1. Wrinkle morphologies with two distinct wavelengths (pages 1225–1232)

      Chelsea S. Davis and Alfred J. Crosby

      Article first published online: 8 JUN 2012 | DOI: 10.1002/polb.23104

      Thumbnail image of graphical abstract

      Unique biaxial wrinkle morphologies containing two distinct wavelengths are reported here for the first time. A library of new morphologies ranging from zigzag ridges to ellipsoidal bumps and corn-on-the-cob structures are demonstrated. The wrinkling process consists of a series of aligned wrinkles formed on a partially crosslinked elastomer. The elastomer is then fully crosslinked and a uniaxial compressive strain is applied orthogonal to the primary wrinkles, resulting in smaller secondary wrinkles superimposed on the larger primary aligned wrinkles.

    2. Bulk and shear rheology of a symmetric three-arm star polystyrene (pages 1233–1244)

      Jiaxi Guo, Luigi Grassia and Sindee L. Simon

      Article first published online: 16 JUL 2012 | DOI: 10.1002/polb.23113

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      The effects of star-shaped structures on the shear rheological properties of polymers have been widely investigated because of their unique architectures. In this work, the bulk viscoelastic response of star-shaped polymers is investigated. The results are compared with a counterpart linear polystyrene sample having a similar molecular weight as the star span molar mass, indicating that the star behaves similarly but with slightly higher Tgs at elevated pressures and slightly higher limiting bulk moduli in glass and rubbery states.

    3. Fast annealing and patterning of polymer solar cells by means of vapor printing (pages 1245–1252)

      Ignasi Burgués-Ceballos, Mariano Campoy-Quiles, Laia Francesch and Paul D. Lacharmoise

      Article first published online: 9 JUL 2012 | DOI: 10.1002/polb.23119

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      Solvent vapor annealing of the active layer in polymer solar cells improves device efficiencies. Here, vapor printing is used as a fast annealing treatment (<5 seconds). Poly(3-hexylthiophene):fullerene-based devices are exposed to solvent vapor in a nitrogen flow through a nozzle, allowing local application. Three different regimes of structural properties and photovoltaic performance evolution are identified upon annealing, and up to a twofold increase in efficiencies is shown in comparison to as-cast devices.

    4. Comparative analyses of the electrical properties and dispersion level of VGCNF and MWCNT: Epoxy composites (pages 1253–1261)

      Paulo Cardoso, Jaime Silva, Maria Conceição Paiva, Ferrie van Hattum and Senentxu Lanceros-Mendez

      Article first published online: 20 JUN 2012 | DOI: 10.1002/polb.23110

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      Adding nanofillers to polymers can impart a number of additional properties. The electrical properties and the level of dispersion of vapor-grown carbon nanofibers (VGCNFs) and multiwalled carbon nanotubes (MWCNTs) in epoxy resin composites are here shown to depend on the nanofillers' intrinsic characteristics and their interaction with the matrix. Although the filler's aspect ratio dictates the electrical conductivity of VGCNF composites, other intrinsic characteristics must be considered for the MWCNT composites.

    5. An advanced gas/vapor permeation system for barrier materials: Design and applications to poly(ethylene terephthalate) (pages 1262–1270)

      Jong Suk Lee, Preeti Chandra, Steven K. Burgess, Robert Kriegel and William J. Koros

      Article first published online: 23 JUN 2012 | DOI: 10.1002/polb.23116

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      Understanding the effect of flavor molecules on multicomponent copermeation in barrier materials is critical to accurate shelf life modeling and to extending current packaging materials to more demanding markets. The current permeation system utilizes a new approach for obtaining precise vapor activities by using a highly accurate syringe pump. Preliminary multicomponent permeation results using O2, CO2, and CH3OH in different morphologies of PET demonstrate the feasibility of the new gas/vapor permeation system.

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