PDF(Pubmed)
Abstract：
In this work, we studied propylene polymerization using some α-diimine palladium catalysts with systematically varied ligand sterics. In propylene polymerization, the ligand steric effect exhibits significant variations on the catalytic activity, polymer molecular weight, and branching density. However, the regio control for the polymer microstructure is poor. Furthermore, copolymerization of 1-octene with the highly challenging and biorenewable comonomer acrylic acid was investigated. High copolymer molecular weights and high comonomer incorporation ratios could be achieved in this system. This study provides a novel access for the direct synthesis of branched carboxylic acid functionalized polyolefins.
摘要：
在这项工作中,我们使用一些具有系统变化的配体位阻的α-二亚胺钯催化剂研究了丙烯聚合。在丙烯聚合中，配体空间效应对催化活性表现出显著的变化，聚合物分子量,和分支密度。然而,聚合物微观结构的区域控制较差。此外，研究了1-辛烯与高度挑战性和生物可再生共聚单体丙烯酸的共聚。在该体系中可以实现高共聚物分子量和高共聚单体引入比。本研究为支化羧酸官能化聚烯烃的直接合成提供了新的途径。
