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以含镁配合物ClMg(OR).ROH为载体制备了高效丙烯聚合催化剂,对催化剂进行了聚合反应动力学研究,考察了聚合温度、铝钛比、铝硅比和氢气加入量对催化剂聚合反应性能的影响。实验结果表明,该催化剂具有良好的氢调敏感性和立体定向性,动力学行为呈现典型的上升-衰减型,聚合过程中聚丙烯形态复现了催化剂的形态。在三乙基铝为助催化剂、甲基环己基二甲氧基硅烷为外给电子体、n(Al):n(Ti)=300、n(Al):n(Si)=15、氢气加入量(质量分数)为0.0200%、温度为70℃的条件下,该催化剂具有较高的活性(12.0kg/g),聚丙烯等规度可达97%以上。
The high-performance propylene polymerization catalyst was prepared by using ClMg (OR) .ROH as support. The polymerization kinetics of the catalyst was studied. The effects of polymerization temperature, Al-Ti ratio, Al-Si ratio and hydrogen addition on catalyst polymerization The impact of performance. The experimental results show that the catalyst has good hydrogen sensitivity and stereospecificity, and the kinetic behavior shows a typical ascending-decaying type. The morphology of the catalyst is reappeared during the polymerization of polypropylene. In the case of triethyl aluminum as cocatalyst, methylcyclohexyldimethoxysilane is an external electron donor, and n (Al): n (Ti) = 300 and n (Al): n The catalyst has a high activity (12.0kg / g) and a polypropylene isotacticity of 97% or more under the conditions of a mass fraction (mass fraction) of 0.0200% and a temperature of 70 ° C.