Zn(HMDS)_(2)催化剂对丙交酯的开环聚合研究  

Ring-Opening Polymerization of Lactide with Zn(HMDS)_(2) Catalyst

作　　者：杨雪梅 郭泫华 何晓智[3] 徐广强 王庆刚 Xue-mei Yang;Xuan-hua Guo;Xiao-zhi He;Guang-qiang Xu;Qing-gang Wang(Key Laboratory of Photoelectric Conversion and Ultilization of Solar Energy,Qingdao Institute of Bioenergy and Bioprocess Technology,Chinese Academy of Sciences,Qingdao 266101;Shandong Energy Institute,Qingdao 266101;Department of Chemistry,College of Sciences,Northeastern University,Shenyang 110819;Center of Materials Science and Optoelectronics Engineering,University of Chinese Academy of Sciences,Beijing 100049)

机构地区：[1]中国科学院青岛生物能源与过程研究所,太阳能光电转化与利用重点实验室,青岛266101 [2]山东能源研究院,青岛266101 [3]东北大学理学院化学系,沈阳110819 [4]中国科学院大学材料科学与光电子工程中心,北京100049

出　　处：《高分子学报》2025年第3期442-448,共7页Acta Polymerica Sinica

摘　　要：双(双三甲基硅基)胺锌(Zn(HMDS)_(2))作为一种新型、结构简单、无需配体、低毒性的催化剂用于丙交酯的开环聚合,对拓宽其在生物领域的应用具有重要的科学意义.本研究深入探索了Zn(HMDS)_(2)催化丙交酯L-LA和D-LA开环聚合过程,探讨了聚合活性、可控性以及聚合物的结晶性能和热性能.结果表明,使用Zn(HMDS)_(2)/苯甲醇(BnOH)催化体系可以实现丙交酯单体的高效可控开环聚合反应,并且所得聚合物保持高的立构规整度,P_(m)均大于0.99.用示差扫描量热法(DSC)分析了所得聚合物的热性能,发现随着聚乳酸聚合度的增长,冷结晶温度(T_(c))、玻璃化转变温度(T_(g))、熔融温度(T_(m))都呈现一定的变化规律.As a new catalyst with simple structure,no ligands and low toxicity,bis(trimethylsilyl)amine zinc[Zn(HMDS)_(2)]has been used for ring-opening polymerization of lactide,which is of great scientific significance to expand its application in the biological field.In this work,the ring-opening polymerization of lactide L-LA and D-LA catalyzed by Zn(HMDS)_(2) was investigated,and the polymerization activity,controllability,crystallization,and the thermal properties of the polymer were discussed.The results showed that the Zn(HMDS)_(2)/BnOH catalytic system could achieve highly efficient and controllable ROP of lactide monomer,and the obtained polymers maintain high stereo-regularity with P_(m) greater than 0.99.The thermal properties of the polymer were analyzed by differential scanning calorimetry(DSC).It was found that the cold crystallization temperature(T_(c)),glass transition temperature(T_(g))and melting temperature(T_(m))changed regularly with the increase of polymerization degree.

关 键 词：聚乳酸 Zn(HMDS)_(2) 开环聚合 

分 类 号：O631.5[理学—高分子化学] O643.36[理学—化学]