Get access

Polyblend systems of polyurethane (AU) and ethylene acrylic elastomer (vamac) using the sulfur cure systems

Authors

  • B. B. Khatua,

    1. Materials Science Centre, Indian Institute of Technology, Kharagpur, Kharagpur-721302, India
    Search for more papers by this author
  • C. K. Das

    Corresponding author
    1. Materials Science Centre, Indian Institute of Technology, Kharagpur, Kharagpur-721302, India
    • Materials Science Centre, Indian Institute of Technology, Kharagpur, Kharagpur-721302, India
    Search for more papers by this author

Abstract

Blends of polyurethane (Vibrathane-5008, Uniroyal Co., USA) and ethylene acrylic elastomer (vamac B-124, du Pont, USA) prepared through three different blending techniques have been studied over the entire composition range. The processability and the aging properties of the polyurethane elastomer were improved as a result of blending with ethylene acrylic elastomer. IR spectral analysis of the (50:50) blend of the two elastomers, without any curatives, suggested that the interchain crosslinking reaction occurred between the two elastomers phases on heat treatment. The thermal stability of the blends also improved on heat treatment, before addition of curatives. Phase morphological study revealed that the extractability of the single phase by solvent was also restricted on preheating the preblends, probably due to the interchain crosslinking. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 80: 2737–2745, 2001

Ancillary