摘要
研究了聚(苯乙烯-丙烯酸)(PSAA)负载-氯化钕(NdCl3)配合物催化苯乙烯与4-乙烯基吡啶共聚活性。考察了Al/Nd摩尔比、聚合时间以及苯乙烯与4-乙烯基吡啶比(g.g-1)对苯乙烯与4-乙烯基吡啶共聚的影响。结果表明:这种极性单体与烯烃的共聚反应能有效发生,聚合物负载氯化钕配合物的催化性能高于同类小分子稀土氯化物,配合物催化活性随着Al/Nd摩尔比的增加而增加,随聚合时间的延长而降低,反应时间为2 h时配合物催化活性最高;4VPy和St摩尔比为4∶2时产率较高;得到的聚合物具有良好的耐热性。
The catalytic activity of poly （styrene-crylicacid） （PSAA） supported neodymium chloride（ NdCl3 ） complex for the copolymerization of styrene and 4-vinylpyridine was studied. The influence of various factors, such as Al/Nd molar ratio, reaction time, and ratio of styrene to 4-vinypyridine （g·g^-1 ）, on copolymerization of styrene and 4-Vinylpridine was investi- gated. The results show that the copolymerization of polar monomers with olefins occurs efficiently. The catalytic activity of polymer-supported catalyst is higher than that of the similar small molecule catalysts. The activity of PSAA· Nd complex increases with increasing Al/Nd ratios and decreases with increasing polymerization time, the highest activity of PSAA·Nd is observed at 120 min. High yield is found at the ratio of styrene to 4-vinylpyridine is 4 ： 2. The resulted polymer shows very good thermal stability.
出处
《中国稀土学报》
CAS
CSCD
北大核心
2005年第6期663-667,共5页
Journal of the Chinese Society of Rare Earths
基金
吉林省教育厅自然科学基金资助项目(0223)
关键词
稀土催化剂
苯乙烯
4-乙烯基吡啶
极性单体
共聚
稀土
rare earth catalyst
styrene
4-vinylpyridine
polar monomer
copolymerization
rare earths
