Ternary copolymerization of ethylene, propylene and hex-1-ene

Abstract

The ternary copolymerization of ethylene, propylene and hex-1-ene on the catalyst system vanadium triacetylacetonate-di-isobutylaluminium chloride has been investigated. The addition of hex-1-ene to the composition of the ethylene-propylene copolymer leads to a lower yield and to a change in the composition of the ternary copolymer. Some kinetics features of the process have been investigated. When hex-1-ene is added to the liquid phase, the rate of the process and the MWD of the resulting copolymer are bimodal in character. The addition of from 3 to 12 mole % hex-1-ene units to the ethylene-propylene elastomer composition enhances some properties of the elastomer. It was shown in [1–6] that the addition of small amounts of but-1-ene to the composition of ethylenepropylene copolymers markedly improves their mechanical properties. In the present instance hex-1-ene is used as the third comonomer, and some features of the ternary copolymerization of ethylene, propylene and hex-1-ene have been investigated.