助催化剂对BCZ-108催化剂聚合行为的影响研究

在铝钛物质的量比为25、50、100、150、200、300条件下,研究丙烯聚合用BCZ-108催化剂的聚合行为及聚丙烯的主要性能,并与常规应用的NA催化剂进行对比。结果表明,随着铝钛物质的量比的增大,两种催化剂的聚合反应速率的衰减越来越快,聚丙烯的立体定向性越来越低,熔点越来越低,分子量分布越来越宽;BCZ-108催化剂的聚合活性比NA催化剂高30%以上;两种催化剂的聚合活性在铝钛物质的量比为50时达到最高,此时BCZ-108催化剂的活性为1 212 g·g^-1,NA催化剂的活性为907 g·g^-1。

Study on the effect of cocatalyst on the polymerization behavior of BCZ-108 catalyst

Polymerization behavior of BCZ-108 catalyst for propylene polymerization and the main properties of polypropylene were studied under the conditions of 25,50,100,150,200 and 300 molar ratios of aluminum to titanium,and compared with NA catalyst.The experimental results showed that with the increase of the molar ratio of Al/Ti,the polymerization rate of the two catalysts decreased faster and faster,the stereospecimetric property and melting point of polypropylene were lower and lower,and the molecular weight distribution was wider and wider.The polymerization activity of BCZ-108 catalyst was 30% higher than that of NA catalyst.The polymerization activity of the two catalysts reached the highest when the molar ratio of Al/Ti was 50,and the activity of BCZ -108 catalyst was 1 212 g·g^-1 and that of NA catalyst was 907 g·g^-1.