β to α form transition observed in the crystalline structures of syndiotactic polystyrene (sPS)

Tetsu Ouchi, Suguru Nagasaka, Atsushi Hotta

研究成果: Article査読

17 被引用数 (Scopus)

抄録

A solid-solid crystalline transition from β to α forms in syndiotactic polystyrene (sPS) was found during the mechanical deformation in the temperature range of 130-218 °C, studied by X-ray and infrared spectroscopy. α and β forms, in contrast to the other two crystalline structures (γ and δ forms) in sPS, are two major crystalline forms manufactured through a concise molding process which is industrially readily accessible. There have been a number of structural transitions found between two crystalline structures among the four different crystalline forms of sPS. In this work, β to α form transition at well below the melting temperature of sPS (∼270 °C) was found by mechanical deformation, which became more pronounced as temperature increased. The structural transition was intimately related to the crystallization temperature and the densities of α and β forms.

本文言語English
ページ(範囲)2112-2119
ページ数8
ジャーナルMacromolecules
44
7
DOI
出版ステータスPublished - 2011 4 12

ASJC Scopus subject areas

  • 有機化学
  • ポリマーおよびプラスチック
  • 無機化学
  • 材料化学

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