Abstract

AbstractThe fundamental thermal and mechanical experiences that a polymer undergoes in a processing operation have been identified and analyzed from the point of view of their effect on polymer morphology and properties. By means of controlling the pressure, temperature, and flow history of the polymer during fabrication processing, morphologies can be produced which result in desired properties. The utility of this approach is illustrated by an example involving an order of magnitude change in environmental stress cracking achieved by controlling internal structure through controlling pressure and temperature history.

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