Characterization of poly p - methylstyrene - b - isobutylene - b - p - methylstyrene 对甲基苯乙烯和异丁烯三嵌段共聚物的分析与表征
Ams alpha methyl styrene 甲基苯乙烯
The aryl - alkylation of - methylstyrene with phenol in the presence of various strong acid catalysts were studied 分别以磷酸冰醋酸,苯酚铝,阳离子型交换树脂及络合物为催化剂,研究了-甲基苯乙烯与苯酚的烷基化反应。
The molecular weight of sppms was in the range of 4x 104g / mol to 10 x 104g / mol , and the molecular weight distribution was from 1 . 6 to 6 . 0 P -甲基苯乙烯与苯乙烯共聚时, p -甲基苯乙烯共聚能力高于苯乙烯,二者倾向于无规共聚,仍为间规聚合物。
The aim of this thesis is in search of the catalysts which are moderate and stable for preparing mono - dispersed macroporous materials , by means of syndiotactic polymerization of styrene 并且将部分催化剂用于苯乙烯与p -甲基苯乙烯共聚合、苯乙烯与乙烯共聚合,对材料的功能化作了初步的探讨。
The copolymerizations of p - methylstyrene and styrene , styrene and ethylene were also investigated using some of these catalytic systems . the three kinds of catalysts showed their own polymerization principles . the changes of polymerization activity and polymer properties depended on the structure of complexes , different polymerization conditions such as the catalyst concentration , the molar ratio of al to ti , the polymerization temperature and reaction time 三类催化剂催化苯乙烯和p -甲基苯乙烯均聚时都有各自一定的聚合规律,不同的配体结构,聚合条件催化剂浓度、铝钛比、聚合温度和反应时间对聚合活性以及聚合物的性质有很大影响。