Poly(butylene succinate) (PBS), poly(butylene adipate) (PBA), and poly(butylene suberate) (PBSub) were synthesized and enzymatic hydrolysis was performed in the presence of cutinase. The residues degraded at different times were characterized with respect to their molecular, thermal, crystalline, and chemical structures. The results showed that the degradation behavior of the three polyesters highly depends on their CH₂/CO ratio, morphology, and thermal characteristics. The three polyesters were nearly degraded after 24 h, and the degradation rates was in the order of PBSub > PBA > PBS. Gel permeation chromatography and end-group analysis confirmed that the mechanism of enzymatic hydrolysis changed from endo-type to exo-type. The analyses of differential scanning calorimetry, powder X-ray diffraction, and Fourier transform infrared spectroscopy indicated that the cutinase could simultaneously degrade the crystalline and amorphous regions of polyester films.

合成了聚丁二酸丁二酯（PBS），聚己二酸丁二酯（PBA）和聚辛二酸丁二酯（PBSub），并在角质酶的存在下进行了酶促水解。根据其分子，热，晶体和化学结构对在不同时间降解的残基进行表征。结果表明，三种聚酯的降解行为很大程度上取决于它们的CH _2。/ CO比，形态和热特性。三种聚酯在24 h后几乎降解，降解速率为PBSub> PBA> PBS。凝胶渗透色谱法和端基分析证实了酶水解的机理从内型变为外型。差示扫描量热法，粉末X射线衍射和傅立叶变换红外光谱分析表明，角质酶可同时降解聚酯膜的结晶和非晶区。