Institute of Fundamental Technological Research

Crystallization kinetics of oriented poly(ethylene terephthalate) have been studied in a temperature range close to Tg. It has been shown that orientation of the amorphous phase promotes a substantial increase in crystallization rate. This effect, in turn, depends on the crystallization temperature: the higher the temperature, the stronger is the effect of orientation. From experimental results it was possible to make an estimation of parameters describing quantitatively the crystallization kinetics in the oriented state.