摘要
研究了两类阳离子聚合催化体系即ＳｂＣｌ３／ＡｌＣｌ３复合体系和高分子负载体系ＰＳ－１８８－ＳｂＣｌ３／ＡｌＣｌ３，交联ＰＳ－ＳｂＣｌ３／ＡｌＣｌ３对α－蒎烯（Ｍ１）／苯乙烯（Ｍ２）的共聚反应性能。测定了竞聚率，考察了反应条件、催化剂组分特别是ＰＳ－１８８－ＳｂＣｌ３、交联ＰＳ－１８８－ＳｂＣｌ３组分等对竞聚率的影响。结果表明，该两类催化体系对Ｍ１／Ｍ２均具有良好的共聚合性能，ｒ２和ｒ２／ｒ１大幅度降低；并可通过温度、组分比进行调控；特别是高分子负载催化体系，不但共聚活性比Ｓｂ－Ｃｌ３／ＡｌＣｌ３更高，ｒ１特别是ｒ２大幅度降低，而且共聚反应可在０～２０℃的高温下进行，共聚产物分子量大幅度提高，分布变窄。
The cationic polymerization binary catalyst system SbCl 3/AlCl 3 and two kinds of polymer supported Lewis acid catalyst for the copolymerization of α pinene(M 1) and styrene(M 2) were studied. The monomer reactivity ratios( r 1 and r 2) under the different conditions were determinated. The results show that these catalyst systems have high activities for the cationic copolymerization of M 1 and M 2. With the SbCl 3/AlCl 3 instead of AlCl 3 or with the polymer supported SbCl 3 instead of SbCl 3, the value of r 2 and r 2/ r 1 all decrease significantly, and the copolymerization can be controled by setting up reaction conditions such as temperature and Sb/Al ratio. The polystyrene supported SbCl 3/AlCl 3 catalyst system have superiority over SbCl 3/AlCl 3, it could obtain copolymers with higher molecular weight and narrow molecular weight distributions even at high temperatrue 0￣20 ℃.
出处
《高分子材料科学与工程》
EI
CAS
CSCD
北大核心
1999年第4期59-62,共4页
Polymer Materials Science & Engineering
基金
国家自然科学基金和广东省科学基金
关键词
蒎烯
苯乙烯
阳离子共聚
共聚合
催化剂
cationic copolymerization of α pinene/styrene
control copolymerization
polymer supported SbCl 3/AlCl 3 catalyst
monomer reactivity ratios determination
