中文摘要：

以三氟化硼-乙醚络合物为催化剂,进行了γ-戊内酯（γ-VL）与ε-己内酯（ε-CL）的本体开环共聚的研究.采用1H-NMR、13C-NMR证实了所得共聚物的结构,并对共聚物的分子量、组成、熔点等进行了表征.结果表明,在一定的条件下,难以均聚的γ-VL可与ε-CL发生共聚反应,从而在共聚物链结构中引入少量的γ-VL单元.γ-VL单元的引入使得共聚物的分子量和熔点下降.由K-T法估算出两种单体共聚的竞聚率分别为r（ε-CL）=17.6,r（γ-VL）=0.0078.

英文摘要：

Bulk ring-opening copolymerization of γ-valerolactone （γ-VL） and ε-caprolactone （ε-CL） was carried out with boron trifluoride etherate complex （BF3· OEt2 ） as catalyst. The structures of the resuhant copolymers were determined by ^1H-NMR and ^13C-NMR spectroseopies. The molecular weight, composition and melting point of the copolymers were characterized by means of GPC, ^1H-NMR and DSC, respectively. Although being unable to ringopening homopolymerize, γ-VL was ring-opening copolymerized with ε-CL to give copolymers P（γ-VL-co-ε-CL） containing certain amount of γ-VL unit. The introduction of γ-VL unit resulted in significant decrease of the molecular weight and mehing point of the copolymers. The reactivity ratio of ε-CL and γ-VL was estimated as 17.6 and 0.0078, respectively, by the K-T method.