Soeda Yasuyuki, Toshima Kazunobu, Matsumura Shuichi
Faculty of Science and Technology, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan.
Macromol Biosci. 2004 Aug 9;4(8):721-8. doi: 10.1002/mabi.200400042.
Novel enzymatically recyclable poly(carbonate-urethane) consisting of a diurethane moiety as a hard segment and a carbonate linkage as an enzymatically cleavable unit was prepared by the polycondensation of biodegradable diurethanediol and diethyl carbonate using lipase. The produced poly(carbonate-urethane) was readily transformed by lipase into the corresponding cyclic oligomers which were more easily repolymerized by lipase to produce a higher molecular weight poly(carbonate-urethane) than that of the parent poly(carbonate-urethane).
通过脂肪酶催化可生物降解的二氨基甲酸酯二醇与碳酸二乙酯缩聚反应，制备了一种新型的酶促可回收聚（碳酸酯 - 聚氨酯），其由作为硬段的二氨基甲酸酯部分和作为酶促可裂解单元的碳酸酯键组成。所制备的聚（碳酸酯 - 聚氨酯）可通过脂肪酶轻松转化为相应的环状低聚物，这些环状低聚物更易于通过脂肪酶重新聚合，从而制备出分子量高于母体聚（碳酸酯 - 聚氨酯）的聚（碳酸酯 - 聚氨酯）。
