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以无水氯化稀土/环氧氯丙烷为催化剂,催化ε-己内酯开环聚合,所得聚己内酯可通过大分子改性在分子链中引入离子液体,从而制备两亲性可降解生物材料。系统地探讨了不同稀土氯化物,环氧氯丙烷/稀土氯化物比值,聚合温度,时间及单体浓度等条件对聚合反应的影响。用FT-IR、GPC、1H-NMR和热分析等对聚合物结构和性能进行了表征,并对ε-己内酯开环聚合机理进行了分析。
Anhydrous chlorinated rare earth / epichlorohydrin catalyst for the catalytic ε-caprolactone ring-opening polymerization, the resulting polycaprolactone macromolecules can be introduced into the molecular chain through the ionic liquid ionic liquid to prepare amphiphilic biodegradable biomaterials. The effects of different rare earth chlorides, epichlorohydrin / rare earth chloride ratio, polymerization temperature, time and monomer concentration on the polymerization were systematically investigated. The structure and properties of the polymers were characterized by FT-IR, GPC, 1H-NMR and thermal analysis. The ring-opening polymerization of ε-caprolactone was also analyzed.