金属サレン錯体によるブタジエンの精密重合 Precision Polymerization of Butadiene
This review describes a precision polymerization of 1, 3-butadiene(Bd) with metallosalen/MAO catalysts [metal=Co, Ni, Fe, V, Ti; salen=<i>N, N</i>′-bis (salicylidene) ethylenediamine]. 1, 4-<i>cis</i> selectivity and molecular weight control of the polymer of Bd with various metallosalen/MAO catalysts was investigated. Among metallosalen/MAO catalysts examined, the alkyl substituted in the aromatic ring of the (salen) Co (II) gave high molecular weight polymer with high 1, 4-<i>cis</i> content. In the polymerization of Bd, both polymer yields and 1, 4-<i>cis</i> contents increased by introducing bulky groups at suitable positions of (salen) Co (II) complexes. Simultaneous control of 1, 4-<i>cis</i> selectivity and molecular weight of polymer was achieved with the (salen) Co (II)/MAO catalyst which possessed <i>tert</i>-butyl groups at suitable positions in the aromatic rings and ethylene diamine groups substituted with phenyl group. The copolymerization of styrene and Bd with (salen) Ni (II)/MAO catalyst was also investigated.
日本ゴム協會誌 80(1), 13-18, 2007-01-15
THE SOCIRETY OF RUBBER SCIENCE AND TECHNOLOGYY, JAPAN