中性Zn配合物催化环酯聚合的研究  

Study on the neutral zinc complexes catalyzed polymerization of cyclic ester

作　　者：杨海清[1] 张新生[1] 申东升[1] 刘丰收[1] 

机构地区：[1]广东药学院医药化工学院,广东中山528400

出　　处：《广东药学院学报》2015年第1期20-24,共5页Academic Journal of Guangdong College of Pharmacy

基　　金：国家自然科学基金项目(21004014);广东省高等学校优秀青年教师培养计划项目(Yq2013101)

摘　　要：目的探讨中性Zn金属配合物对环酯开环聚合的影响。方法以取代吡啶醛、芳香胺和Zn Cl2为原料,合成和表征一系列具有不同位阻和不同电子效应取代基的吡啶亚胺类配合物,并将这些配合物用于催化ε-己内酯聚合,考察该催化剂体系位阻效应和电子效应对ε-己内酯聚合的催化性能影响。结果配体芳环上邻位位阻对催化活性的影响很大,位阻小则活性高;间位上的位阻保护了活性中心,使催化剂的热稳定性增加;当间位引入强吸电子基团时,活性显著增加。结论该类催化剂合成简单、成本低廉、热稳定性好,可作为进一步开发聚己内酯的研究基础,并具有潜在的应用价值。Objective To study the zinc complexes performance of cyclic ester polymerization. Methods Substituted pyridine aldehyde,aromatic amine and zinc chloride as raw materials,a series of pyridineimine zinc complexes with different steric and electronic substituents were synthesized and characterized which were used to catalyze ε-caprolactone polymerization. The steric hindrance and electronic effect on the catalytic properties of the ε-caprolactone polymerization were inspected. Results The experiments showed that the steric on the aromatic ring ortho-position had much effect on the catalytic activity,small resistance resulted high activity. But the steric on meso-position increased the thermal stability of the catalyst,which protected the activity center. When the meso-position introduced strong electron-withdrawing group,its activity increased significantly. Conclusion The catalyst was simple synthesized,low cost,stable and practical,which could be used as the basic research of further development on the ε-caprolactone polymerization with potential value of application.

关 键 词：中性Zn配合物 环酯聚合 聚己内酯 医用高分子材料 

分 类 号：O633.14[理学—高分子化学]