Control of Molecular Inconsistency of 1,4-trans-Polydienes by Variation of the Composition of Vanadium-Titanium Catalyst

摘要

Ternary catalytic systems containing vanadium and titanium chlorides and triisobutylaluminum (TIBA) are classical industrial catalysts of 1,4-mms-polymeriza-tion of 1,3-dienes [1]. There is a necessity to control the molecular inconsistency of the produced polymer as regards the molecular weight distribution (MWD) and microstructure. Previous studies [2, 3] demonstrated the possibility of changing the content of trans-1,4 units in polyisoprene and poly-1,3-pentadiene by varying the ratio of TIBA to the mixture of vanadium and titanium chlorides.