Abstract

Chain conformations of poly(vinyl chloride) have been investigated in order to explain the relatively high crystalline content of atactic PVC. A study of chain configurations and conformations leads to the conclusion that three different regular straight chain structures exist: the syndiotactic zig-zag chain, the isotactic helix and an isotactic straight chain. This isotactic straight chain conformation has a slightly higher energy than the isotactic helix but it nevertheless occurs in bulk PVC in appreciable amounts.

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