CA/聚己内酯-环氧丙烷共混膜的生物降解研究

Biodegradation of Cellulose Acetate(CA)/Co-poly (caprolactone-epoxy propane) Blends

研究了二醋酸纤维素（CA）与己内酯—环氧丙烷共聚物膜的生物降解过程。发现共混物膜的生物降解性能与其组成密切相关。共混膜的降解速率随着己内酯—环氧丙烷共聚物含量的增加而加快。共混物膜的生物降解是从表面开始进行的，并逐步深入到共混物膜的内部。在降解过程中，分子量较小的部分首先开始降解，而且降解的速度较高。分子量高的部分降解较慢，控制着整个共混膜的降解速率。

The biodegration of the blending flims of cellulese acetate(CA)and co-poly (capro-lactone-epoxy propane)was Studied. It was found that the biodegradation of the blending films isclosely related with the composition of the blends-The biodegradation of the blends increases withincreasing co-poy(caprolactone-epoxy propane) .The biodegradation occurs from the surface offilms and is gradually developed to the inside of them. The biodegradation of the part with the low-er molecular weight is easier and faster than that with the higher molecular weight and the rate ofthe biodegrdation of the blending films is controlled by the degradation of the part with the highermoecular weight.