1,3-二醚为内给电子体的丙烯聚合催化剂的研究

Study on Propylene Polymerization Catalyst with 1,3-Oiether as Internal Donor

研究了以1,3-二醚为内给电子体的丙烯聚合催化剂的性能,通过不同方法得到了具有不同定向能力的以9,9-双(甲氧基甲基)芴为内给电子体的催化剂,并将其在间歇本体工业聚丙烯装置上进行了应用试验,试验结果表明,二醚催化剂的活性高,可达230 kg／g,为现有工业催化剂的2-4倍;同时二醚催化剂的氢调敏感性也高于现有工业催化剂。通过GPC,13C NMR,DSC和X衍射等方法研究了所得聚合物的物性,实验结果表明,用二醚催化剂可制得具有不同等规度的相对分子质量分布较窄的聚合物。另外测试了所得聚合物的力学性能,并对其进行了初步的加工应用试验,试验结果表明,所得聚合物具有良好的机械和加工性能。

Performance of catalysts with 9, 9 - di (methoxymethyl) fluorene as internal donor were studied. Catalysts going polymers of different isospecificity were obtained by different preparation methods. Application trials of these catalysts in industrial bulk propylene polymerization batch process of different scales showed the catalysts not only had high activities reaching 230 kg/g, which was 4 times as high as that of the existing industrial catalyst with di - n - butyl - phthalate (DNBP) as internal donor, but also had better hydrogen response. The produced polymers were characterized by means of GPC,13C NMR.DSC and X-ray spectrum. Industrial application showed that polymers with different isotacticity narrow relative molecular mass distribution,good mechanical and processing properties could be obtained by the diether catalysts.