Biodegradation characteristics of polycaprolactone (PCL) films with three different molecular weights after being degraded by Candida antarctica lipase were investigated. The changes of the PCL films before and after degradation were characterized. The results showed that the degradation process of PCL films could be roughly divided into two phrases: a rapid degradation phase and a slow degradation phase. Molecular weights of PCL films had no influence on the performance of lipase; however, increasing molecular weight caused the numbers of pores on the degraded PCL films to increase, and the pores became deeper as the degradation time increased. The results also showed that the crystallinity of the films decreased with increasing degradation time, and both the crystalline and the amorphous regions of the films were simultaneously degraded. The thermal stability of the films also gradually decreased with the increase of degradation time. Despite the above changes, the degradation did not cause the chemical composition and structure of PCL to change, and PCL remained the main component.

南极假丝酵母降解三种分子量的聚己内酯（PCL）薄膜的生物降解特性对脂肪酶进行了研究。表征了降解前后PCL膜的变化。结果表明，PCL薄膜的降解过程大致可分为两个阶段：快速降解阶段和缓慢降解阶段。PCL膜的分子量对脂肪酶的性能没有影响。然而，分子量增加导致降解的PCL膜上的孔数量增加，并且随着降解时间的增加，孔变得更深。结果还表明，膜的结晶度随降解时间的增加而降低，并且膜的结晶区和非晶区同时降解。随着降解时间的增加，薄膜的热稳定性也逐渐降低。尽管有上述更改，