The Kinetics of Shear-Induced Crystallization in Poly(Ethylene Terephthalate)

Abstract

The kinetics of shear-induced crystallization in PET was studied. The shear-treated samples were obtained from Controlled Shear Rate apparatus (CSR, Figure 1) and the capillary viscometer. In the samples were observed the differences of crystallization behavior by DSC. The kinetic model suggested by Hoffman-Lauritzen, Nakamura was used to analyze experimental results.

The crystallization behavior of shear-treated samples depended on temperature and shear stress. On the lower shear rate region, the rate of crystallization depended on shear stress and the growth rate induced by fluid flow reached the critical point in the region of a certain high shear rate. The empirical data were simulated by the suggested model.

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