摘要
将茂金属配合物Ｃｐ２ＺｒＣｌ２负载在经甲基铝氧烷（ＭＡＯ）处理后的蒙脱土（ＭＴ）上或直接负载在蒙脱土上制备了载体催化剂ＭＴ／ＭＡＯ／Ｃｐ２ＺｒＣｌ２和ＭＴ／Ｃｐ２ＺｒＣｌ２，前者催化乙烯聚合在Ａｌ／Ｚｒ摩尔比降低至３００时仍有较高的活性。所得到的聚乙烯（ＰＥ）相对分子质量及熔点均高于均相催化剂催化聚合所得的ＰＥ。通过溶脱试验可以证明茂金属配合物牢固地负载在蒙脱土的层间。
Metallocene catalysts supported between the layers of montmorillonite(MT) have been prepared by reacting MT with methylaluminoxane(MAO) and then with Cp 2ZrCl 2 or directly with Cp 2ZrCl 2 MT/MAO/Cp 2ZrCl 2 and MT/Cp 2ZrCl 2 can polymerize ethlyene The amount of additional MAO for the polymerization was lowered to a mole ratio of Al/Zr of 300 molecular weight,and the melting point of polyethlyene polymerized with MT supported catalysts were higher than that of PE obtained with homogenous metallocene catalysts It is confirmed by extraction experiments that the metallocene catalyst is securely confined between the layers of MT
出处
《石油化工》
EI
CAS
CSCD
北大核心
1998年第12期890-894,共5页
Petrochemical Technology
