外给电子体对BCM-100催化剂聚合行为的影响

研究了使用二异丁基二甲氧基硅烷(Donor B)和环己基甲基二甲氧基硅烷(Donor C),二环戊基二甲氧基硅烷(Donor D)和四乙氧基硅烷(Donor T)为外给电子体对BCM-100催化剂在85℃聚合动力学和聚丙烯性能的影响。结果表明,使用以上四种外给电子体时,用Donor B时,聚合速率最大,聚合活性最高,聚丙烯的分子量分布最宽;用Donor D时,聚合速率衰减最慢,催化剂立体定向性最高,聚丙烯的熔点和分子量最高;用Donor T时,聚合速率最低,聚合活性最低,催化剂立体定向性最低,聚丙烯的熔点最低。

Effect of external electron donors on the polymerization behavior of BCM-100 catalyst

Studied the effect on the kinetic behavior of BCM-100 catalyst,using diisobutyl dimethoxy silane(Donor B)and cyclohexyl methyl dimethoxy silane(Donor C),dicyclopentyl dimethoxy silane(Donor D),and tetraethoxysilane(Donor T)as external electron donors on the polymerization kinetics and polypropylene properties of BCM-100 catalyst at 85℃.The results showed that:When using the above four kinds of external electron donors,with Donor B,the polymerization rate is the largest,the polymerization activity is the highest,and the molecular weight distribution of polypropylene is the widest;with Donor D,the polymerization rate decays the slowest,the catalyst stereotaxis is the highest,and the melting point and molecular weight of polypropylene are the highest;with Donor D,the polypropylene has the highest melting point and molecular weight.At T,the polymerization rate was the lowest,the polymerization activity was the lowest,the stereotacticity of the catalyst was the lowest,and the melting point of polypropylene was the lowest.