Abstract: The non-isothermal crystallization kinetics of bulk polymerized propylene/1-butene random copolymers was studied using DSC. It was found that Jeziorny method had some limitations to interpret the non-isothermal crystallization behavior of this system, and that of Mo Zhishen method could do this well. The F(T) values increased with increasing degree of crystallinity. At the same crystallinity, crystallization rate of the copolymers decreased with increasing 1-butene content. For a given sample, the αvalue did not vary with crystallinity.

Key words: bulk polymerization, propylene/1-butene random copolymer, non-isothermal crystallization kinetics