GENERAL DYNAMIC MATHEMATICAL-MODELING OF HETEROGENEOUS ZIEGLER-NATTA AND METALLOCENE CATALYZED COPOLYMERIZATION WITH MULTIPLE-SITE TYPES AND MASS AND HEAT-TRANSFER RESISTANCES

Homogeneous and heterogeneous Ziegler-Natta catalyzed copolymerization s are described by a novel dynamic mathematical model that considers t he presence of multiple catalytic site types and mass and heat transfe r effects on polymerization rate and polymer properties. Soluble catal ysts are regarded as a special case of the general modelling where onl y one or two site types are present and mass and heat transfer resista nces are considered negligible. The Stockmayer bivariate distribution will be used to predict distributions of chain length and chemical com position of copolymer products.