Journal of Polymer Science Part B: Polymer Physics

Cover image for Vol. 49 Issue 18

15 September 2011

Volume 49, Issue 18

Pages i–ii, 1277–1345

  1. Cover Image

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Full Papers
    5. Erratum
    1. You have free access to this content
      Cover Image, Volume 49, Issue 18 (pages i–ii)

      Version of Record online: 11 AUG 2011 | DOI: 10.1002/polb.22341

      Thumbnail image of graphical abstract

      Polymerized ionic liquids (PILs) present an enticing opportunity for the development of polymeric “single-ion” conductors with potential applications in electrical energy storage and energy conversion devices such as batteries and fuel cells under a wide range of environmental conditions. The synthesis of well-defined PILs and correlations of their chemical structures with their thermal stabilities and ionic conductivities remain relatively obscure. On page On page 1287 of this issue, Mahesh Mahanthappa and co-workers describe the chemical attributes and single-anion conductivities of two homologous series of PILs under humidified and nearly anhydrous conditions. (Cover artwork by Ryan L. Weber, University of Wisconsin–Madison.)

  2. Reviews

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Full Papers
    5. Erratum
    1. You have free access to this content
      Influence of branching architecture on polymer properties (pages 1277–1286)

      Xinyuan Zhu, Yongfeng Zhou and Deyue Yan

      Version of Record online: 29 JUL 2011 | DOI: 10.1002/polb.22320

      Thumbnail image of graphical abstract

      The architectures, properties, and potential applications of hyperbranched polymers (HBPs) are highly dependent on their degree of branching (DB). This review summarizes the effect of the DB on the physical and chemical properties of HBPs, including rheological properties, crystallization and melting behaviors, glass transition, thermal and hydrolytic degradations, phase characteristics, lower critical solution temperature phase transitions, optoelectronic properties, encapsulation capability, self-assembly behavior, and biomedical applications. The structure-property relations will build a bridge between the syntheses and applications of highly branched polymers.

  3. Full Papers

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Full Papers
    5. Erratum
    1. Thermal and ion transport properties of hydrophilic and hydrophobic polymerized styrenic imidazolium ionic liquids (pages 1287–1296)

      Ryan L. Weber, Yuesheng Ye, Steven M. Banik, Yossef A. Elabd, Michael A. Hickner and Mahesh K. Mahanthappa

      Version of Record online: 29 JUL 2011 | DOI: 10.1002/polb.22319

      Thumbnail image of graphical abstract

      Polymerized ionic liquids (PILs) have a wide range of potential applications in catalysis, nanomaterials synthesis, gas separation media, batteries, and fuel cells. The physical properties of a homologous series of hydrophilic poly(4-vinylbenzyl alkylimidazolium chloride) homopolymers and related hydrophobic PIL homopolymers are reported. The hydrophilic PILs exhibit high ionic conductivities (σ ≈ 10−6 – 10−2 S cm−1) that depend on the relative humidity, whereas the ionic conductivities of the hydrophobic PILs (σ ≈ 10−7 – 10−3 S cm−1) depend predominantly on polymer segmental motion.

    2. Micromechanical modeling of the deformation kinetics of semicrystalline polymers (pages 1297–1310)

      A. Sedighiamiri, L. E. Govaert and J. A. W. van Dommelen

      Version of Record online: 28 JUN 2011 | DOI: 10.1002/polb.22297

      Thumbnail image of graphical abstract

      An accurate prediction of the mechanical behavior of semicrystalline polymers requires a good description of all various deformation mechanisms in the heterogeneous microstructure. A micromechanical constitutive model used to capture the yield kinetics and texture evolution in such materials is modified here to improve its predictive abilities, in particular for the stress-dependence of the rate of plastic deformation, often known as slip kinetics.

    3. Nanocomposites of polyamide-11 and carbon nanostructures: Development of microstructure and ultimate properties following solution processing (pages 1311–1321)

      Gaurav Mago, Dilhan M. Kalyon and Frank T. Fisher

      Version of Record online: 11 JUL 2011 | DOI: 10.1002/polb.22311

      Thumbnail image of graphical abstract

      The microstructure and ultimate properties of polyamide-11 (PA-11) can be influenced by the presence of nanoparticles as well as uniaxial drawing. Here, a solution crystallization technique is used to generate different types of morphologies encapsulating carbon nanotubes and nanofibers. Upon crystallization from dilute solutions, PA-11 crystallizes on the surfaces of the carbon nanotubes and nanofibers, resulting in nano-hybrid shish-kebab morphology. Significant changes in microstructures and mechanical properties of PA-11 nanocomposites films are achieved upon uniaxial drawing.

    4. Water absorption in polyaniline emeraldine base (pages 1322–1331)

      Manel Canales, David Aradilla and Carlos Alemán

      Version of Record online: 28 JUN 2011 | DOI: 10.1002/polb.22300

      Thumbnail image of graphical abstract

      Polyaniline (PAni) is a conducting polymer with growing technological applications. The absorption of water is known to have a large effect on both the organization and conformation of the polymer chains, and thus its mechanism needs to be understood to optimize this material. A combination of computer modeling and atomic force microscopy is used to build a complete and understandable view of the polyaniline–water interactions, and to explain the influence of moisture on the morphology of the polymer.

    5. Compatibility studies of polystyrene and poly(vinyl acetate) blends using electrostatic force microscopy (pages 1332–1338)

      Mohammed M. Kummali, Gustavo A. Schwartz, Angel Alegría, Richard Arinero and Juan Colmenero

      Version of Record online: 29 JUN 2011 | DOI: 10.1002/polb.22301

      Thumbnail image of graphical abstract

      Although compatibility and phase structure of polymer blends can be studied by different techniques, detailed information on the miscibility at local scale is very difficult to obtain. Electrostatic force microscopy is an evolution of conventional AFM that allows mapping of the dielectric properties of the sample simultaneously with topological and phase separation information, thus providing a new powerful tool in the study of compatibility of blends at the nanoscale. Here, it is used to demonstrate that polystyrene and poly(vinyl acetate) are thermodynamically immiscible polymers.

    6. Phase transformation and enhancement of toughness in polyvinylidene fluoride by onium salts (pages 1339–1344)

      R. P. Vijayakumar, Devang V. Khakhar and Ashok Misra

      Version of Record online: 29 JUN 2011 | DOI: 10.1002/polb.22303

      Thumbnail image of graphical abstract

      The β phase of PVDF crystals is polar and has excellent piezoelectric properties, in contrast to the non-polar α phase, which, however, is predominant after normal melt processing. During normal processing, the β phase is obtained in a second step from the resulting α-PVDF films by stretching to high draw ratios. This work shows that the β phase can be formed directly using onium salts, which act as nucleating agents. In addition, the addition of the salts is shown to significantly increase the toughness and elongation at break of the PVDF films.

  4. Erratum

    1. Top of page
    2. Cover Image
    3. Reviews
    4. Full Papers
    5. Erratum
    1. You have free access to this content
      The role of alkane dithiols in controlling polymer crystallization in small band gap polymer:Fullerene solar cells (page 1345)

      Tiziano Agostinelli, Toby A. M. Ferenczi, E. Pires, Samuel Foster, Andrea Maurano, Christian Müller, Amy Ballantyne, Mark Hampton, Samuele Lilliu, Mariano Campoy-Quiles, Hamed Azimi, Mauro Morana, Donal D. C. Bradley, James Durrant, J. Emyr Macdonald, Natalie Stingelin and Jenny Nelson

      Version of Record online: 11 AUG 2011 | DOI: 10.1002/polb.22312

      This article corrects:

SEARCH

SEARCH BY CITATION