Preparation of High Molecular Weight Poly(L-lactide-co-caprolactone)(85-15)  

作　　者：湛雪辉 申雄军 LI Zhaohui LI Xia CAO Fen 

机构地区：[1]School of Chemical and Biological Engineering, Changsha University of Science and Technology

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2013年第1期139-143,共5页武汉理工大学学报（材料科学英文版）

基　　金：Supported by the National Natural Science Foundation of China (No.20976017);the Technological Project of Hunnan Province(Nos.2010FJ3098 and 2010NK3001);the project funded by Hunnan Province Education Office(No.11C0018)

摘　　要：Poly（L-lactide-co-caprolactone）（85-15）[P（LLA-CL）（85-15）] was synthesized from high purity L-lactide and e-caprolactone using tin octoate as initiator by ring-opening polymerization, and characterized by infrared spectrum and IH-NMR spectrum. The synthesized P（LLA-CL）（85-15） is a random copolymer. The influences of polymerization temperature, polymerization time, dosage of initiator and polymerization pressure on the weight average molecular weight and the polydispersity index of P（LLA-CL）（85-15） were investigated. The optimum preparation conditions of P（LLA-CL）（85-15） are： the polymerization pressure is less than 0.5 Pa, the polymerization temperature is 130 ~C, the n（M）/n（I） ratio is 8 000/1, and the polymerization time is 36 h. Under the condition, the weight-average molecular weight of prepared P（LLA-CL）（85-15） is 65.6x 104, and molecular weight distribution coefficient is 1.15.Poly（L-lactide-co-caprolactone）（85-15）[P（LLA-CL）（85-15）] was synthesized from high purity L-lactide and e-caprolactone using tin octoate as initiator by ring-opening polymerization, and characterized by infrared spectrum and IH-NMR spectrum. The synthesized P（LLA-CL）（85-15） is a random copolymer. The influences of polymerization temperature, polymerization time, dosage of initiator and polymerization pressure on the weight average molecular weight and the polydispersity index of P（LLA-CL）（85-15） were investigated. The optimum preparation conditions of P（LLA-CL）（85-15） are： the polymerization pressure is less than 0.5 Pa, the polymerization temperature is 130 ~C, the n（M）/n（I） ratio is 8 000/1, and the polymerization time is 36 h. Under the condition, the weight-average molecular weight of prepared P（LLA-CL）（85-15） is 65.6x 104, and molecular weight distribution coefficient is 1.15.

关 键 词：poly（L-lactide-co-caprolactone）（85-15） COPOLYMERIZATION high molecular weight characterization 

分 类 号：TQ323.4[化学工程—合成树脂塑料工业]