To more precisely control the degradation rate of poly(trimethylene carbonate) (PTMC), self-blending films were prepared via the ternary self-blending of pure PTMC with a molecular weight of 334, 152, and 57 kg/mol. The in vitro enzymolysis degradation of the ternary self-blending films was performed in lipase solutions. The results showed that ternary self-blending could control the degradation of PTMC by adjusting the mass ratio of high/medium/low molecular weight PTMC in the composition, and the PTMC₃₃₄/PTMC₁₅₂/PTMC₅₇ films with a mass ratio of 1/4/16 showed mass loss of 85.96% after seven weeks of degradation, while that of PTMC₃₃₄/PTMC₁₅₂/PTMC₅₇ films with a mass ratio of 1/1/1 was 96.39%. The former and latter’s degradation rate constant was 13.263 and 23.981%/w, respectively, and the former presented better morphology stability than the latter. The strategy of ternary self-blending could simultaneously bestow PTMC with a lower degradation rate and good morphology stability, indicating that ternary self-blending is an efficient way to control the degradation performance of PTMC more precisely.

为了更精确地控制聚（三亚甲基碳酸酯）（PTMC）的降解速率，制备了自混膜 通过纯 PTMC 的三元自混合，分子量分别为 334、152 和 57 kg/mol。这体外三元自混膜的酶解降解是在脂肪酶溶液中进行的。结果表明，三元自共混可以通过调节组合物中高/中/低分子量PTMC的质量比来控制PTMC的降解，质量比为1/的PTMC ₃₃₄ /PTMC ₁₅₂ /PTMC ₅₇薄膜4/16 在降解七周后质量损失为 85.96%，而 PTMC ₃₃₄ /PTMC ₁₅₂ /PTMC ₅₇质量比为 1/1/1 的薄膜为 96.39%。前者和后者的降解速率常数分别为13.263和23.981%/w，且前者的形态稳定性优于后者。三元自共混策略可以同时赋予 PTMC 较低的降解速率和良好的形态稳定性，表明三元自共混是更精确控制 PTMC 降解性能的有效方法。