Abstract

In this contribution, novel bio-derived rosin acid ester compounds have been developed and used as internal electron donors to prepare MgCl₂ supported titanium catalysts for propylene polymerization. The results of the polymerization showed that tri-n-amyl maleate, triiso-amyl maleate and tri-n-heptyl maleate as internal electron donors in Ziegler-Natta catalysts all have high polymerization activity and stereoregularity. In particular, the Ziegler-Natta catalyst with tri-n-amyl maleate as the internal electron donor has the highest activity (up to 33.4 kgPP·gCat⁻¹·h⁻¹) for propylene polymerization and the isotacticity of polypropylene is as high as 96.8% determined by ¹³C NMR. Simultaneously, the obtained polypropylene with a relatively broad molecular weight distribution of 9.0 and melt flow rate of 160.3 g/10 min, which is beneficial to processing and has practical industrial application value when used as the basic material of melt blown cloth for medical mask.

摘要

在这一贡献中，新的生物衍生松香酸酯化合物被开发并用作内部电子给体来制备用于丙烯聚合的MgCl ₂负载的钛催化剂。聚合反应的结果表明，三- Ñ戊酸盐，三异戊基的马来酸盐和三- ñ -庚基马来酸盐，为在齐格勒-纳塔内电子给体催化剂均具有高的聚合活性和立构规整性。特别地，齐格勒-纳塔催化剂与三Ñ戊马来酸盐，为内给电子体具有最高的活性（高达33.4 kgPP·g催化剂^-1 ·H ^-1）用于丙烯聚合的和聚丙烯的等规度是高达96.8% 由¹³ C NMR。同时，所得聚丙烯的分子量分布较宽，为9.0，熔体流动速率为160.3 g/10 min，作为医用口罩熔喷布的基础材料有利于加工，具有实际工业应用价值。