论文部分内容阅读
进行了以正丁氧基三氯化钛和二丁氧基二氯化钛为活性组分、氯化镁和苯甲酸乙酯的加合物为载体的载体型催化体系用于丙烯聚合反应的研究。在适宜的聚合条件下,两种催化剂在常压下的催化活性和定向度都较高。当丙烯压力为7公斤/厘米~2时,活性为108,200克聚丙烯/克钛,产品等规度为96.％。与TiCl_4为活性组分的同类型催化剂比较,这两种催化剂的反应速度比较平稳。活性组分中引入烷氧取代基具有明显的降低分子量的作用,这有可能通过选择合适的烷氧取代基引入催化剂系统,使聚合产物的分子量控制在所需要的范围内。
A series of supported catalyst systems were synthesized by the reaction of n-butoxytitanium trichloride and dibutoxytitanium dichloride with the adduct of magnesium chloride and ethylbenzoate as the carrier. Under appropriate polymerization conditions, the catalytic activity and the degree of orientation of the two catalysts are both higher at atmospheric pressure. When the propylene pressure of 7 kg / cm ~ 2, the activity of 108,200 grams of polypropylene / g of titanium, product specifications as 96.%. Compared with the same type of catalyst TiCl 4 as the active component, the reaction speed of these two catalysts is relatively stable. The introduction of an alkoxy substituent into the active ingredient has a clear molecular weight reduction effect which makes it possible to control the molecular weight of the polymerization product to the desired range by selecting suitable alkoxy substituents for introduction into the catalyst system.