修饰Al2O3负载的烯基取代茂金属催化体系催化乙烯聚合的研究

• 作 者: 计兵 王立 封麟先 钱延龙 黄吉玲
• 机 构: 浙江大学高分子科学与工程学系!杭州310027,浙江大学高分子科学与工程学系!杭州310027,浙江大学高分子科学与工程学系!杭州310027,华东理工大学有机金属实验室!上海200237,华东理工大
• 出 处: 高分子学报
• 发表日期: 1999年05期
• 关键词: 茂金属 负载型催化剂 修饰无机物载体 乙烯聚合

A new supported catalytic system of Cp  Zr Cl2/ B F3/ Al2 O3 for ethylenepolymerization was prepared . The preparation conditions such as pretreatment temperature ,reaction time and the concentration of added B F3 were investigated . It was found that thechemicalreaction and physical adsorption occurred between B Fand Al2 O3 . Their frequencywas dependent on the O Hconcentration at Al2 O3 surfaces. Ahigher polymerization activity106 ～107g P E/mol Zr·h was obtained by using the resultantsupported catalysteven atlower[ Al]/[ Zr] ratios.

A new supported catalytic system of Cp  Zr Cl2 / B F3 / Al 2 O 3 for ethylene polymerization was prepared. The preparation conditions such as pretreatment temperature, reaction time and concentration of added B F3 were investigated. It was found that the chemical reaction and handling between B Fand Al 2 O 3. Their frequency was dependent on the O Hconcentration at Al 2 O 3 surfaces. Ahigher polymerization activity 106 ~ 107 g PE / mol Zr · h was obtained by using the resultants supported catalysteven atlower [Al] / [Zr] ratios.