| 摘要 |
FIELD: chemistry.SUBSTANCE: method for partial hydrogenation of random copolymers of vinyl aromatic compounds and conjugated dienes is realised in the presence of 2-methoxyethyl tetrahydrofuran as a randomising agent. Reaction of the random copolymer of a vinyl aromatic compound and a conjugated diene dissolved in a hydrocarbon solvent is carried out with hydrogen in the presence of a titanium complex and an alkylating agent until the required degree of hydrogenation is achieved. The alkylating agent is selected from compounds of general formula MgRR, where Rand Rare identical or different alkyl radicals with 1-12 carbon atoms. The weight-average molecular weight Mof the starting random butadiene-styrene copolymer can reach 200000-1000000.EFFECT: invention improves control of the degree of hydrogenation of the copolymer and enables to maintain or improve mechanical and dynamic properties.11 cl, 4 tbl, 18 ex |
