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Effects of blending on the polymorphic behavior of melt-crystallized syndiotactic polystyrene

✍ Scribed by Gaetano Guerra; Claudio De Rosa; Vincenzo M. Vitagliano; Vittorio Petraccone; Paolo Corradini

Publisher
John Wiley and Sons
Year
1991
Tongue
English
Weight
435 KB
Volume
29
Category
Article
ISSN
0887-6266

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✦ Synopsis

Abstract

The complex polymorphic behavior of syndiotactic polystyrene (s‐PS) in melt‐crystallized samples is altered by blending with poly (2,6‐dimethyl‐1,4‐diphenylene oxide) (PPO). In particular, to render the beta form in these blends, starting with samples containing the Ξ± or Ξ³ froms, requires much lower temperatures and shorter melting times than for pure s‐PS. On the basis of the results, it is suggested that this phenomenon is due to more rapid loss of the memory of the Ξ± form, for the same temperature and time, in the melt in the presence of PPO molecules.

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