Changchun Yinghua Institute has made progress in the preparation of polyolefin elastomers

In recent years, the domestic high-end polyolefin materials, especially the market demand for polyolefin elastomer materials, have maintained rapid growth

Recently, based on the previous exploration and accumulation of catalyst structure design, synthesis and optimization, Cui Dongmei, a researcher at the Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, designed and synthesized a class of quinoline-methylene-fluorenylscandium dialkyl groups with restricted geometry.

DFT theoretical calculations show that the electronic effect and steric hindrance of the quinoline side arm of the complex play a decisive role in the formation of the E-SF copolymer with a special sequence structure: the weak electrical attraction of the quinoline side arm increases the Lewis acidity of the central metal , to improve the activity of ethylene polymerization, which is conducive to the formation of continuous crystalline segments, which is controlled by kinetics; the steric hindrance of the quinoline side arm hinders the insertion of the bulky p-fluorostyrene to a certain extent, so that it can only Discrete insertion into the polymer backbone, not continuous insertion, is thermodynamically controlled

The functionalized polyolefin thermoplastic elastic material with excellent mechanical properties can be prepared with high activity through the regulation of the sequence structure of the material

Thermoplastic elastomers with excellent mechanical properties prepared by copolymerization of ethylene and fluorostyrene