The α″ "superstructure" of syndiotactic polystyrene: A frustrated structure

Laurent Cartier, Takumi Okihara, Bernard Lotz

Research output: Contribution to journalArticle

112 Citations (Scopus)

Abstract

The crystal structure of syndiotactic polystyrene (sPS) in its stable α form (a so-called "superstructure" named α″) is reevaluated. As shown by all previous investigations, the trigonal unit cell contains three triplets of extended sPS chains. The azimuthal orientation of the three triplets is shown to differ from those assumed so far, which generates a clear-cut example of frustrated packing. The azimuthal settings and relative shifts of the triplets indicate that two triplets maximize their interactions, while the third one interacts less favorably with its neighbors. This frustrated packing scheme fully justifies the three-triplets unit cell and constitutes an interesting variant of related frustrated packings previously described for isochiral three-fold helices.

Original languageEnglish
Pages (from-to)3303-3310
Number of pages8
JournalMacromolecules
Volume31
Issue number10
DOIs
Publication statusPublished - May 19 1998

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics
  • Inorganic Chemistry
  • Materials Chemistry

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