Preparation of High Molecular Weight Poly（L-lactide-co-caprolactone）（85-15）
来源期刊：Journal Of Wuhan University Of Technology Materials Science Edition2013年第1期
论文作者：湛雪辉 申雄军 LI Zhaohui LI Xia CAO Fen
文章页码：139 - 143
摘 要：Poly（L-lactide-co-caprolactone）（85-15）[P（LLA-CL）（85-15）] was synthesized from high purity L-lactide and ε-caprolactone using tin octoate as initiator by ring-opening polymerization, and characterized by infrared spectrum and 1H-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 ℃, 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 65.6×104, and molecular weight distribution coefficient is 1.15.
湛雪辉，申雄军，LI Zhaohui，LI Xia，CAO Fen
School of Chemical and Biological Engineering, Changsha University of Science and Technology
摘 要：Poly（L-lactide-co-caprolactone）（85-15）[P（LLA-CL）（85-15）] was synthesized from high purity L-lactide and ε-caprolactone using tin octoate as initiator by ring-opening polymerization, and characterized by infrared spectrum and 1H-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 ℃, 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 65.6×104, and molecular weight distribution coefficient is 1.15.
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