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(一)概述 五十年代以来,齐格勒—纳塔催化剂在烯烃定向聚合工业生产中得到了广泛的应用。我院应用丙—丙镏分合成聚丙烯树脂的中间试验选择了TiCl_3—Alet_2Cl这一催化体系。 TiCl_3的制法很多,我们最初选用金属铝还原TiCl_4用振动磨研磨的方法制取S—TiCl_3。为提高TiCl_3的催化活性和定向度添加第三组分(六甲基磷酰胺、异戊醚)。活性提高到350pp克/克Cat,聚合物等规度达95％。实践表明活性提高幅度不大,所得聚合物的形态不
(A) Overview Since the fifties, Ziegler - Natta catalyst in the directional polymerization of olefins industrial production has been widely used. In our hospital, the catalytic system of TiCl_3-Alet_2Cl was selected from the intermediate test of polypropylene-polypropylene. TiCl_3 system of many, we initially selected metal aluminum reduction TiCl_4 vibration mill grinding method S-TiCl_3. A third component (hexamethylphosphoramide, isoamyl ether) was added to increase the catalytic activity and orientation of TiCl_3. Increased activity to 350 pg / g Cat, polymer isotacticity up to 95%. Practice shows that little increase in activity, the resulting polymer morphology is not