研究了一系列不同含量的ＳＢＳ与聚丙烯的共混物的辐射硫化效应．辐照一定剂量后，由于辐射交联和裂解的进行，使ＰＰ／ＳＢＳ的流变性能和结构及内耗行为发生大的变化，ＰＰ与ＳＢＳ两者玻璃化转变温度间距离变小，从而改善了ＰＰ／ＳＢＳ的相容性。ＰＰ和ＳＢＳ在辐射引发自由基的情况下，分散相ＳＢＳ形成交联结构，连续相ＰＰ发生裂解，体系的表观粘度下降，但ＰＰ的玻璃化转变激活能仍然提高了。 The radiation curing effect of a series of blends of SBS with polypropylene at different contents was investigated. After radiation a certain dose, due to the radiation crosslinking and cracking, the rheological properties and the structure and internal friction behavior of PP / SBS changed greatly. The distance between glass transition temperature of PP and SBS became smaller, which improved the PP / SBS compatibility. In the case of radiation-induced free radicals, PP and SBS formed a cross-linked structure of dispersed phase SBS, the continuous phase PP was cracked, the apparent viscosity of the system decreased, but the glass transition activation energy of PP still increased.