以辛酸亚锡为催化剂、乙二醇为引发剂、L-丙交酯和ε-已内酯为反应单体，采用开环聚合的方法合成一系列单体配比不同的共聚物PCLA。采用红外分析、核磁共振分析表征了PCLA的结构，采用差示扫描量热仪和凝胶渗透色谱仪分析了PCLA的热性能和相对分子质量，通过测量接触角观察了PCLA的亲水性。结果表明，引发剂乙二醇的使用以及改变单体配比可以调节PCLA的分子结构、相对分子质量和热性能，但对其亲水性影响不大。%L-lactide/ε-caprolactone copolymers with varying compositions and molecular weight were synthesized via ring-opening polymerization using Sn（ II ） octoate as a catalyst and ethylene glycol as an initiator. The structure of the copolymers was characterized using Fourier transform infrared spectrometer, nuclear magnetic resonance spectra, and gel permeation chromatography, the thermal properties using differential scanning calorimeter, and the hydrophilicity using contact angle tester. Changing molar ratios of the monomer and using ethylene glycol as an initiator in feed could adjust the chemical compositions, molecular weight and thermal properties of the copolymers, however, had little effect on the hydrophilicity.
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