申请人:NANJING TECH UNIVERSITY
公开号:US11015021B2
公开(公告)日:2021-05-25
Disclosed in the present invention is a preparation method for a polyester, relating to the technical field of organic catalysis and polymeric materials. The preparation method in the present invention comprises: (1) using pyridine and saccharin in a ratio of 1:1 to prepare pyridine saccharin salt in tetrahydrofuran at 60° C. and separating the pyridine saccharin salt out in methanol and hexane. (2) Freeing out a small amount of pyridine from the pyridine saccharin salt in a heating state, catalyzing by the pyridine saccharin salt and pyridine a cyclic lactone or a carbonate to be ring-opened and polymerized to form the polyester; and the system has no other compound residues. (3) In the presence of an alcohol initiator, catalyzing by the pyridine saccharin salt the cyclic lactone to be ring-opened and polymerized to obtain the polyester. The catalytic system can efficiently synthesize a specific polylactone. Compared with a method for synthesizing a polyester by the use of a metal-containing catalyst in the prior art, the system has wide application. Moreover, the system is advantageous of no metal residue, narrow molecular weight distribution and no chain transesterification, and therefore has great commercial application potential in bio-pharmaceutical field and microelectronic field.
本发明公开了一种聚酯的制备方法,涉及有机催化和高分子材料技术领域。本发明的制备方法包括:(1) 使用吡啶和糖精以 1:1 的比例在 60° C 的四氢呋喃中制备吡啶糖精盐,并在甲醇和己烷中分离出吡啶糖精盐。(2) 在加热状态下从吡啶糖精盐中游离出少量吡啶,通过吡啶糖精盐和吡啶催化环状内酯或碳酸酯开环聚合形成聚酯;且体系中无其他化合物残留。(3) 在醇类引发剂存在下,通过吡啶糖精盐催化环状内酯开环聚合,得到聚酯。该催化系统可高效合成特定的聚内酯。与现有技术中使用含金属催化剂合成聚酯的方法相比,该系统具有广泛的应用前景。此外,该体系还具有无金属残留、分子量分布窄、无链转移等优点,因此在生物制药领域和微电子领域具有巨大的商业应用潜力。