【摘要】 <正> 关于多分散性对丁基橡胶加工行为的影响,有人进行了研究,近年来人们对丁基橡胶的分子量分布与加工性能的研究,又有新的报道,结果表明,丁基橡胶的分子量分布对其加工时收缩变形有很大的影响,我们曾用过渡金属卤化物和卤代烷基铝-加氢汽油催化体系合成了丁基橡胶,但在加工时收缩率大和不均匀,我们利用高聚物沉淀分级原理,在烷烃溶剂中添加氯代烃（CH₂Cl₂,CH₃Cl）,混合溶剂制备的丁基橡胶,其分子量分布及加工收缩性能比单用汽油溶剂时有显著改进,其综合性能基本上达到了Polvsar 301水平。更多还原

【Abstract】 In the synthesis of butyl rubber using transition metal halide and alkylaluminum halide catalyst in alkane solvents, the molecular weight distribution (MWD) of the copolymers can be controlled by adding certain amount (30-40%) of solvents of higher polarity, such as alkyl halides, into the alkane. The butyl rubbers thus obtained have approximately the same MWD, processing behavior and physical and mechanical properties as those of polysar 301.更多还原