ON THE THERMAL-BEHAVIOR OF THE ORIENTED AMORPHOUS PHASE OF POLY(ETHYLENE-TEREPHTHALATE)

Abstract

When amorphous poly(ethylene terephthalate) (I) yarns were annealed for a const. time at different temps., the degree of crystallinity increased with increasing temp. Unoriented samples began to crystallize at >100°; oriented samples crystd. at <100°. The faster crystallizability of oriented amorphous I at <110° showed a greater mol. mobility than that for unoriented amorphous I

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