Journal: Journal of Polymer Science. Part B, Polymer Physics

Abbreviation

J. Polym. Sci., B, Polym. Phys.

Publisher

Wiley

Journal Volumes

ISSN

0887-6266
0098-1273
1099-0488

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2004 - 200982010 - 201717
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Publications 1 - 10 of 25
  • Rejuvenation of PLLA: Effect of plastic deformation and orientation on physical ageing in poly(l-lactic acid) films
    Item type: Journal Article
    Ghazaryan, Gagik; Schaller, Raphael; Feldman, Kirill; et al. (2016)
    Journal of Polymer Science. Part B, Polymer Physics
  • Solution-crystallization and related phenomena in 9,9-dialkyl-fluorene polymers. I. Crystalline polymer-solvent compound formation for poly(9,9-dioctylfluorene)
    Item type: Journal Article
    Perevedentsev, Aleksandr; Stavrinou, Paul N.; Bradley, Donal D.C.; et al. (2015)
    Journal of Polymer Science. Part B, Polymer Physics
    Polymer-solvent compound formation, occurring via co-crystallization of polymer chains and selected small-molecular species, is demonstrated for the conjugated polymer poly(9,9-dioctylfluorene) (PFO) and a range of organic solvents. The resulting crystallization and gelation processes in PFO solutions are studied by differential scanning calorimetry, with X-ray diffraction providing additional information on the resulting microstructure. It is shown that PFO-solvent compounds comprise an ultra-regular molecular-level arrangement of the semiconducting polymer host and small-molecular solvent guest. Crystals form following adoption of the planar-zigzag β-phase chain conformation, which, due to its geometry, creates periodic cavities that accommodate the ordered inclusion of solvent molecules of matching volume. The findings are formalized in terms of nonequilibrium temperature–composition phase diagrams. The potential applications of these compounds and the new functionalities that they might enable are also discussed.
  • Sorption and swelling of poly(DL-lactic acid) and poly(lactic-co-glycolic acid) in supercritical CO2
    Item type: Journal Article
    Pini, Ronny; Storti, Giuseppe; Mazzotti, Marco; et al. (2008)
    Journal of Polymer Science. Part B, Polymer Physics
  • Self-Diffusion of Small Molecules into Rubbery Polymers: A Lattice Free-Volume Theory
    Item type: Journal Article
    Costa, Liborio I.; Storti, Giuseppe (2010)
    Journal of Polymer Science. Part B, Polymer Physics
    n the framework of the free-volume (FV) theory, a new equation was derived for the evaluation of self-diffusion coefficients of small molecules in polymers above the mixture glass transition temperature. The derivation of the equation turned out to be straightforward once the equivalence between the free volume and the unoccupied volume given by thermodynamic lattice theories is assumed. A parameter evaluation scheme is proposed, which is substantially simpler compared with the conventional Vrentas–Duda approach, even without losing generality. The key assumption is discussed, and its consistency is verified from a numerical viewpoint. A comparison with experimental solvent self-diffusion coefficients for several solvent/polymer binary systems confirmed that the proposed theory presents good correlative ability over wide temperature and composition ranges. Moreover, the introduced thermodynamic foundation allows one to easily include the pressure effect too. In the frame of the proposed lattice free volume theory, the sizes of the polymer jumping units decrease with temperature and increase with pressure. Such behavior converges with theoretical expectations and opens the way for a predictive FV theory.
  • One-pot synthesis of polymer/inorganic hybrids
    Item type: Journal Article
    Russo, Manuela; Campoy-Quiles, Mariano; Lacharmoise, Paul; et al. (2012)
    Journal of Polymer Science. Part B, Polymer Physics
  • Interplay Between Solid State Microstructure and Photophysics for Poly(9,9-dioctylfluorene) within Oriented Polyethylene Hosts
    Item type: Journal Article
    Perevedentsev, Aleksandr; Aksel, Seda; Feldman, Kirill; et al. (2015)
    Journal of Polymer Science. Part B, Polymer Physics
    We present a study of isotropic and uniaxially oriented binary blend films comprising ≤1 wt % of the conjugated polymer poly(9,9‐dioctylfluorene) (PFO) dispersed in both ultra‐high molecular weight (UHMW) and linear‐low‐density (LLD) polyethylene (PE). Polarized absorption, fluorescence and Raman spectroscopy, scanning electron microscopy, and X‐ray diffraction are used to characterize the samples before and after tensile deformation. Results show that blend films can be prepared with PFO chains adopting a combination of several distinct molecular conformations, namely glassy, crystalline, and the so‐called β‐phase, which directly influences the resulting optical properties. Both PFO concentration and drawing temperature strongly affect the alignment of PFO chains during the tensile drawing of the blend films. In both PE hosts, crystallization of PFO takes place during drawing; the resulting ordered chains show optimal optical anisotropy. Our results clarify the PFO microstructure in oriented blends with PE and the processing conditions required for achieving the maximal optical anisotropy.
  • Homoconjugation in poly(phenylene methylene)s: A case study of non-π-conjugated polymers with unexpected fluorescent properties
    Item type: Journal Article
    Braendle, Andreas; Perevedentsev, Aleksandr; Cheetham, Nathan J.; et al. (2017)
    Journal of Polymer Science. Part B, Polymer Physics
  • The influence of bending on the performance of flexible carbon black/polymer composite gas sensors
    Item type: Journal Article
    Kinkeldei, Thomas; Zysset, Christoph; Münzenrieder, Niko; et al. (2013)
    Journal of Polymer Science. Part B, Polymer Physics
  • Liquid ammonia treatment of (cationic) nanofibrillated cellulose/vermiculite composites
    Item type: Journal Article
    Ho, Thi Thu Thao; Zimmermann, Tanja; Caseri, Walter; et al. (2013)
    Journal of Polymer Science. Part B, Polymer Physics
  • Strain hardening of polycarbonate in the glassy state
    Item type: Journal Article
    Govaert, L. E.; Tervoort, Theo A. (2004)
    Journal of Polymer Science. Part B, Polymer Physics
Publications 1 - 10 of 25