Multiblock Microstructure Using a Binary System of Metallocene Catalysts with Diethyl Zinc as Transfer Agent
The aim of this study was to synthesize ethylene-hexene copolymers of the type LLDPE using a combination of metallocene binary catalysts (Cat 1: Cp2ZrCl2 and Cat 2: Et(IndH4)2ZrCl2), where each catalyst has different microstructural control capacities. The effect of diethyl zinc (DEZ) concentration as a chain shuttling agent (CSA) was evaluated in parameters such as catalytic activity, as well as thermal properties, comonomer content incorporated into the polymer chain, crystal structure, and also dynamic mechanical properties of the obtained copolymers.