中文摘要：

采用SEM研究了B30／iPP，B30／sPS和sPS／iPP／B30共混体系的相形态结构。结果表明，B30／iPP，B30／sPS可相容；sPS／iPP是不相容体系，但B30可作为sPS／iPP共混体系的相容剂。DSC结果表明，加入适量的相容剂B30，共混体系中iPP玻璃化温度（iPP-Tg）随B30加入量增加而逐渐升高，而sPS玻璃化温度（sPS—Tg）随B30加入量增加而逐渐降低。在最佳配比条件下，共混物的力学性能比均聚物的要好，共混体系sPS／iPP／B30=90／10／10的无缺口冲击强度为42.3kJ／m^2，拉伸强度为33.7MPa。

英文摘要：

The phase morphology and mechanical properties of B30/iPP, B30/sPS and sPS/iPP/B30 blends were investigated by SEM. These results show that B30/iPP, B30/sPS and sPS/iPP/B30 blends are compatible. While sPS/iPP blend is incompatible. B30, the copolymer of sPS-b-polybutene-1（B30） promoted by metallocene catalyst Cp ＊ Ti（OBz）3/mMAO, can be used as compatilizer to improve the miscibility of sPS/iPP blends. DSC results show that in B30/iPP and sPS/iPP/B30 blends the onset temperature of the iPP-Tg region shifts toward the sPS-Tg, and, the sPS-Tg shifts inward slightly. The mechanical results show that under typical component the mechanical properties of sPS/iPP/B30 blends are better, unnotched izod impact strength is 42. 3 kJ/m^2, tensile strength 33.7 MPa.