【摘要】 用不同分子量的聚苯乙烯在乳液体系中进行过氧化氢基化反应,然后测定这些产品的特性粘数,HPO值（每1,000个苯乙烯结构单元中所合的过氧化氢基平均数目）等。在过氧化氢基聚苯乙烯的红外光谱里,可以在3,200—3,600厘米^-1吸收区里观察到过氧化氢基的吸收带,其吸收强度随着HPO值的增大而加强。最后用这些大分子过氧化物引发甲基丙烯酸甲酯及苯乙烯聚合,得到接枝聚合物。经过分离提纯后,用下列的方法: （1）浊度滴定; （2）热机械性能的测试; （3）水解后测定交换量; （4）红外吸收光谱;证明它们是接枝共聚物。更多还原

【Abstract】 Polystyrene of different molecular weights in emulsified solution was used for the preparation of polystyrene-hydroperoxide, the intrinsic viscosity and HPO-value (the average number of hydroperoxyl groups per 1000 monomeric units of polystyrene) of which were then determined. A wide absorption band in the region of 3200-3600 cm-1 attributed to the hydroperoxyl group was observed in the infrared absorption spectra of the polystyrene-hydroperoxide; its absorption intensity became more marked with increasing HPO-value. The polymeric hydroperoxide was then used for the initiation of vinyl monomers, e.g. styrene and methyl methacrylate respectively, and the final products after purification were identified as graft eopolymers by the following ways:(1) turbidimettic titration,(2) determination of thermomechanical curve,(3) determination of exchange capacity of the eopolymers after alkaline hydrolysis, and(4) infrared absorption spectra.更多还原