| 摘要 |
This invention relates to a process for preparing selectively hydrogenated polydiene block copolymers with regiospecifically placed epoxy groups. The process involves polymerizing a conjugated diolefin under anionic polymerization conditions to form a living polydiene which is combined with a conjugated diolefin having a degree of substitution different than the previously mentioned conjugated diolefin to form a block copolymer which is reacted with hydrogen gas in the presence of a soluble transition metal catalyst and an organometallic reducing agent to form a selectively hydrogenated block copolymer, and epoxidizing the unsaturated sites of the non-hydrogenated blocks. This process allows a variety of structural geometries to be obtained in which the level of functionality is varied independent of molecular weight. |
