丁基改性的甲基铝氧烷助催化乙烯聚合  

Ethylene polymerization using butyl modified methylaluminoxane as cocatalyst

作　　者：韦少义[1] 陈雪蓉 吴江 王霞 赵旭涛 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,甘肃兰州730000 [2]中国石油兰州石化分公司石油化工研究院,甘肃兰州730060

出　　处：《现代化工》2005年第8期35-37,共3页Modern Chemical Industry

基　　金：中国石油天然气集团公司资助项目(040402-17-00)

摘　　要：采用丁基改性的甲基铝氧烷(MMAO-Bu)与茂金属或后过渡金属配合物组成催化体系并催化乙烯聚合或齐聚。考察了MMAO-Bu的助催化活性及其对聚乙烯分子量和齐聚产物分布的影响。结果表明,适宜组成的MMAO-Bu可表现出比MAO更高的助催化活性;在MMAO-Bu的助催化作用下,所得聚乙烯具有较宽的分子量分布,而齐聚产物分布向高碳数的方向移动。Ethylene polymerization using metallocene with butyl-modified methylaluminoxane （MMAO-Bu） or late transition metal complex with MMAO-Bu was studied. Effects of MMAO-Bu on cocatalytic activity of methylaluminoxane（MAO） was investigated along with the molecular weight of polyethylene and oligomer distribution respectively. Results showed that MMAO-Bu had high cocatalytic activity compared to MAO, and the presence of MMAO-Bu gave polyethylene broader molecular weight distribution and led to the formation of oligomers with higher molecular weight.

关 键 词：丁基改性的甲基铝氧烷 茂金属 后过渡金属配合物 乙烯聚合 

分 类 号：TQ426.98[化学工程]