Miscibility and phase behaviour in blends of poly(vinyl alcohol) and a copolyamide

https://doi.org/10.1016/0014-3057(95)00186-7Get rights and content

Abstract

Blends of poly(vinyl alcohol) (PVAl) with a copolyamide (CoPA) randomly composed of 1:1:1 (wt) nylon 6, nylon 66 and nylon 610 structural units were prepared by solution casting from a common solvent N,N-dimethylformamide. The miscibility for the blends was established on the basis of studies by differential scanning calorimetry (DSC). Single, composition-dependent glass transition temperatures (Tg) were observed, indicating that the PVAl/CoPA blends are miscible in the amorphous state. The phase behaviour of the blends was investigated. It was found that the PVAl/CoPA system exhibited lower critical solution temperature (LCST) behaviour, and the cloud point temperatures were measured using DSC. A FTIR study revealed that there are intermolecular hydrogen-bonding interactions between the two polymer components.

References (24)

  • T.S. Ellis

    Polymer

    (1990)
  • T.S. Ellis

    Polymer

    (1988)
  • M.J. Brekner et al.

    Polymer

    (1988)
  • X. Luo et al.

    Polymer

    (1994)
  • E.J. Moskala et al.

    Polymer

    (1985)
  • M.M. Coleman et al.

    Polymer

    (1983)
  • O. Olabisi et al.
  • C. Ha et al.

    Polym. Bull.

    (1993)
  • T.S. Ellis

    Macromolecules

    (1989)
  • M.E. Myers et al.

    Macromolecules

    (1990)
  • Cited by (15)

    • Hydrogen bonds in polymer blends

      2004, Progress in Polymer Science (Oxford)
    • A polymeric solid electrolyte based on a binary blend of poly(ethylene oxide), poly(methyl vinyl ether-maleic acid) and LiClO<inf>4</inf>

      2002, Polymer
      Citation Excerpt :

      Efforts to enhance the ionic conductivity of PEO based PSE focused on suppressing its crystallization, via incorporating compounds with low Tg[12] and by copolymerization of PEO with macromonomers [13]. Copolymerization is a way to lower the melting point, modulus as well as crystallinity and to increase solubility and transparency [14]. Possible alternatives are grafting [15] and crosslinking [16], but these methods require a non-trivial synthetic process and this is a serious drawback to practical applications.

    View all citing articles on Scopus
    View full text