A process for producing an aliphatic polyester by subjecting a cyclic ester to ring-opening polymerization, which comprises adding water to a cyclic ester purified to the extent that a water content is at most 60 ppm to control an overall proton concentration in the cyclic ester, thereby controlling at least one physical property among melt viscosity, molecular weight and yellowness index of the resulting aliphatic polyester.
一种通过将环状酯经过开环聚合来生产脂肪族聚酯的方法,其包括向已纯化至
水含量最多为60ppm的环状酯中添加
水,以控制环状酯中的总质子浓度,从而控制所得到的脂肪族聚酯的熔融粘度、分子量和黄色度指数中的至少一种物理性质。