Structural Transitions During Orientational Drawing of Yarns. Review

Abstract

Known data are generalized on the structural transitions and orientational strengthening of yarns made from different polymers, from the standpoint of the current state of the art. Their characteristic features as well as the similarities and differences for processes forming the structural and mechanical properties are demonstrated. Consideration of the process of orientational drawing of PET is emphasized, letting us show the characteristic features of structural transitions from the amorphous to the crystalline state. Material in this paper has combined basic scientific data on problems of orientational strengthening, which is quite important in the current stage of development of polymer technology for designing new processes.