三烷基铝对甲基铝氧烷性能的影响  

Influence of trialkylaluminum on properties of methylaluminoxane

作　　者：韦少义[1,2] 吴江[3] 陈雪蓉[3] 朱博超[3] 郝萍[3] 徐贤伦[1] 

机构地区：[1]中国科学院兰州化学物理研究所羰基合成与选择氧化国家重点实验室 [2]中国石油兰州石化公司石油化工研究院,甘肃兰州730060 [3]中国石油兰州石化公司石油化工研究院

出　　处：《合成橡胶工业》2005年第4期264-268,共5页China Synthetic Rubber Industry

基　　金：中国石油天然气集团公司资助项目(040402-17-00)。

摘　　要：研究了不同三烷基铝(TRA)[三甲基铝(TMA)、三乙基铝(TEA)或三异丁基铝(TIBA)]及其用量对甲基铝氧烷(MAO)作为茂金属助催化剂催化乙烯聚合的活性、负载化性能和溶解性的影响。结果表明,当MAO溶液中TMA/MAO(摩尔比)为0.4,TIBA/MAO(摩尔比)为0.3,TEA/MAO(摩尔比)为0.2时,MAO的活性最高;TRA的存在对MAO的负载化性能无影响,但有利于改善MAO在甲苯中的溶解性。Ethylene polymerization using metallocene and methylaluminoxane (MAO) with different trialkylaluminum (trimethylaluminum,triethyllaluminum or triisobutylaluminum) catalysts,preparation of supported catalyst, and solubility of the MAO were studied to investigate the influence of trialkylaluminum. The activity of MAO was best when TMA/MAO (mole ratio) was 0.4,TIBA/ MAO (mole ratio) was 0.3,TEA/MAO (mole ratio) was 0.2.The presence of trialkylaluminum had no effect on the supported MAO, but could improve the solubility of the MAO.

关 键 词：三烷基铝 甲基铝氧烷 乙烯聚合 茂金属负载化 溶解性 

分 类 号：TQ333.4[化学工程—橡胶工业]