Proceedings of the Korean Fiber Society Conference (한국섬유공학회:학술대회논문집)

The Korean Fiber Society (한국섬유공학회)
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Molecular Modeling for the Crystal Structure of Stereoregular Poly(vinyl Alcohol) (I) - New Crystal Dimension of Syndiotactic Poly(vinyl Alcohol) -

  • Lyoo, Won-Seok (Korea Institute of Science and Technology) ;
  • Sergei Chvalun (Polymer Structure Lab., Karpov Institute of Physical Chemistry, Moscow, Russia) ;
  • John Blackwell (Department of Macromolecular Science, Case Western Reserve University)
  • Published : 1998.04.01
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Abstract

Poly(vinyl acetate) (PVAc) from which atactic poly(vinyl alcohol) (PVA) is derived, is always noncrystalline. This was attributed to the irregular steric arrangement of the acetyl groups in PVAc. However, the X-ray diffraction patterns of atactic PVA, a derivative of PVAc, were found to show distinct crystallinity, and to give an identity period of 2,52 ${\AA}$ along the fiber axis, despite the expectation of an irregular arrangement of the hydroxyl groups in atactic PVA, in the same manner as that of the acetyl groups in PVAc.(omitted)

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