Answers are grounded in this paper and cite their sources.
A hypothesis concerning the appearance of the endothermic peak of PETP fibre thermogram in the range above glass temperature but below melting temperature is presented. According to this hypothesis, the mobile peak reflects melting of ordered small regions located in the fold surfaces layers of crystalline blocks. These ordered regions result from cold cystallization during the DSC measurement in irregular adjacent reentry folds.
No takes yet. Share an insight, caveat, or question.
A. Jeziorny (1986) studied this question.
Synapse has enriched 10 related papers. Consider them for comparative context: