The non-isothermal crystallization kinetics of iPS-b-iPP block copolymers has been investigated by DSC, The results based on the Jeziorny's method show that in the range of cooling rate of 5 to 20 degrees C/min, the kinetics of non-isothermal crystallization for all of samples is fitted for the Avrami equation quite well, The crystallization rate constant Z(c) relates to the cooling rate, whereas the specific crystallizability G(c) is dependent upon both the cooling rate and composition ratio of iPS-b-iPP copolymers. In addition, a discussion about the relationship between the growing mechanism of crystals and the composition ratio of iPS-b-iPP copolymers was made based on the Avrami exponents, A new kinetics equation of non-isothermal crystallization derived by combining Avrami and Ozawa equation was proved to fit for kinetics of non-isothermal crystallization of iPS-b-iPP copolymers.
