Abstract

Poly(L-lactide-co-glycolide-co-ε-caprolactone) (PLLGC) and 1,4-butanediamine modified maleated poly(D,L-lactide-co-glycolide) (BMPLGA) were both synthesized by ring-opening polymerization with stannous octoate as catalyst. Then PLLGC/BMPLGA blend porous films were prepared by using NaCl particles as a porogen through a solvent casting/particle leaching method. The PLLGC/BMPLGA blend porous films were characterized by Fourier transform infrared spectroscopy, gel permeation chromatography and scanning electron microscopy. The tensile properties of the PLLGC/BMPLGA porous films were also studied. The results showed that the content and size of the NaCl porogens had significant effects on the porosity of the PLLGC/BMPLGA porous films. The tensile strength and elongation percentage of the porous films decreased with increasing porogen content. Thus, both the pore structure and mechanical properties of the porous PLLGC/BMPLGA blend films can be controlled by changing the amount and size of the porogen.

摘要

聚（L-丙交酯-乙交酯-ε-己内酯）（PLLGC）和1,4-丁二胺改性的马来酸化聚（D，L-丙交酯-乙交酯）（BMPLGA）均通过开环聚合反应合成以辛酸亚锡为催化剂。然后，以NaCl颗粒为致孔剂，通过溶剂流延/颗粒浸出法制备了PLLGC / BMPLGA共混多孔膜。通过傅立叶变换红外光谱，凝胶渗透色谱和扫描电子显微镜对PLLGC / BMPLGA共混多孔膜进行了表征。还研究了PLLGC / BMPLGA多孔膜的拉伸性能。结果表明，NaCl致孔剂的含量和大小对PLLGC / BMPLGA多孔膜的孔隙率有显着影响。多孔膜的拉伸强度和伸长率随着致孔剂含量的增加而降低。从而，