CRYSTALLIZATION KINETICS OF OLEFINIC BLOCK COPOLYMERS

摘要

The effect of the blocky chain architecture on spherulite growth rate and bulk crystallization kinetics of novel ethylene-octene block copolymers is described. These copolymers form space-filling spherulites even when the crystallinity is as low as 7 %. Spherulite growth rates were analyzed by Lauritzen-Hoffman theory and the bulk crystallization kinetics were subjected to Avrami analysis. Comparison with random copolymers showed that the blocky architecture imparts a substantially higher crystallization rate.