| 摘要 |
PURPOSE:To effectively improve the anisotropy of the physical properties of moldings, by blending a styrene/methacrylate ester copolymer in the molding of a styrenic hydrocarbon/conjugated diene block copolymer having a specified composition. CONSTITUTION:A styrenic hydrocarbon/conjugated diene block copolymer of formulaIor II (wherein B is a polymer block composed mainly of a conjugated diene; S1, S2 are each a polymer block composed mainly of a styrenic hydrocarbon; n is 1-5) is prepd. in which the terminal styrenic hydrocarbon polymer block S2 of the polymer chain accounts for 55-90wt% of entire styrenic hydrocarbon polymer block, the entire styrenic hydrocarbon content of the block copolymer is 60-85wt% and the number-average MW of the block copolymer ranges from 30,000 to 250,000. 10-100pts.wt. styrene/methacrylate ester copolymer is blended with 100pts.wt. said copolymer. The mixture is molded. |
