新型酚-膦中性镍催化乙烯/极性单体共聚合研究

The functionalization of polyolefin has greatly broadened the application scope of this otherwise nonpolar material,and thus has attracted tremendous attentions from both academic and industrial society. The most direct method for the preparation of functional polyolefin was by the metal-catalyzed coordinative copolymerization of olefins with polar monomers, in which the less oxophilic late metal catalysts are more promising candidates. A series of neutral nickel catalysts based on phosphinophenolate ligands will be synthesized in this project for the copolymerization of olefin with a series of fundamental polar monomers. Both the catalytic activity and the molecular weight of the resulting copolymer will be improved by the optimization of catalyst structure. The relationship between catalyst structure and the olefin/polar monomer copolymerization behavior is expected to be disclosed by the combination of experimental and molecular simulation methods. This is helpful to the development of new catalysts and thus the preparation of novel high performance functionalized polyolefin material.

对非极性的聚烯烃材料进行功能化，以拓宽其应用范围一直以来都是学术和工业界的研究热点。利用金属有机催化剂使烯烃与极性单体直接进行配位共聚合是最直接的制备功能化聚烯烃的方法，其中低亲电性的后过渡金属催化剂在这方面更有应用前景。本项目拟合成一系列基于酚-膦配体的中性镍催化剂，用以催化乙烯与常见极性单体进行配位共聚合，通过对催化剂结构的优化，提高催化活性以及所得共聚物的分子量；结合实验手段以及分子模拟的方法，揭示催化剂分子结构与其催化乙烯/极性单体共聚合反应的关系，以利于新催化剂开发，进而制备性能优异的功能化聚烯烃材料。