Crystallization Behavior of Poly(Ethylene Glycol) Under a Temperature Gradient

Abstract

We studied the feature of poly(ethylene oxide) crystallization under a temperature gradient. Annealing time dependence on d-spacing and orientation of crystalline lamellae for samples crystallized under the temperature gradient was examined by using small-angle X-ray scattering. For this purpose, annealing times of 1 hour and 43 hours to maintain the temperature gradient (hotter side 55℃ and cooler side 35℃) were selected as a parameter to study. Also, we observed the position of crystallization front under the temperature gradient and evaluated the rate of the growth front of crystalline region under the temperature gradient in order to compare with the result for the case of the isothermal crystallization.