Melt Memory Effect on Biaxially Oriented Random Copolyamides: Direct Evidence for Stretch-Induced Crystal Retention above the Equilibrium Melting Point nork Yunqi Xu (349428)

“...Results demonstrate that in PA56/512 random copolymers, the biaxially stretch-induced oriented structures do not dissolve completely into relaxed random coils under the influence of a single temperature. Instead, they undergo partial relaxation into crystalline precursors, maintaining some degree of structural order even at elevated temperatures. ...”