中文摘要：

由2,2-二丁基-2-锡-1,3-二氧环庚烷引发ε-己内酯开环聚合制得环状聚ε-己内酯（3）;3与活性单体α-（1-丙烯酰氧乙基）-ε己内酯反应,合成了活性环状聚ε-己内酯（5）;5在UV辐照下发生分子内交联反应制得活性大分子引发剂6;6引发L-丙交酯接枝共聚合制得环状聚ε-己内酯接枝聚L-乳酸,其结构经NMR,SEC和DSC表征。

英文摘要：

Macrocyclic poly（ε-caprolactone）（3） was prepared by the ring-opening polymerization of ε-caprolactone using 2,2-dibutyl-2-tin-1,3-dioxacycloheptane as the initiator.Active macrocyclic poly（ε-caprolactone）（5） was synthesized by the reaction of 3 with active monomer α-（1-acryloxyethyl）-ε-caprolactone.Active macromolecule initiator（6） was prepared by intramolecular cross-linked reaction of 5 under UV irradiation.L-lactide graft copolymerization was initiated by 6 to give cyclic poly（ε-caprolactone）-g-poly（L-lactide）.The structures were characterized by NMR,SEC and DSC.