Molecular mechanism of shrinkage of polyacrylonitrile fibres
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The shrinkage of polyacrylonitrile fibres in air at 130–170°C, and also in steam or boiling water is connected with the formation of ordered structures due to a redistribution of the interacting CN groups.
Shrinkage of fibres in air at temperatures below 130°C is caused only by disorientation of the macromolecule chains.
KeywordsPolymer Steam Molecular Mechanism Shrinkage Boiling
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