In vitro degradation of PGA, PLA and its blends produced by melt spinning
Seven kinds of blend fibers with different proportions of polyglycolic acid (PGA) and polylactic acid (PLA) (PGA/PLA: 100/0, 90/10, 70/30, 50/50, 30/70, 10/90, 0/100)) were produced by melt-spinning. The degradation behaviors of the blend fibers were investigated with regard to the mass loss, tensile properties, melting point, crystallinity and morphology of fibers by immersing them in phosphate buffered solution (PBS) (pH=7.4) at 37 ℃ for a period of time. The experimental results showed that the operation of blending PGA with PLA were easier than copolymerization of them, and the obtained blend fibers were in good performance, regardless of its tensile, crystallinity or appearance. PGA completely degraded in 4 weeks, and PGA/PLA (90/10) also lost its strength after 3.5 weeks. PGA/PLA (70/30) and PGA/PLA (50/50) had obvious changes in tensile strength and mass loss after 4 weeks. The changes of PGA/PLA (30/70) and PGA/PLA (10/90) were relatively small, and PLA had little changes. The degradation rate of the blends decreased with the increase of PLA.
WANG Hongying ZHANG Peihua GUO Zheng
Engineering Research Center of Technical Textiles, Ministry of Education College of Textiles, Donghua University, Shanghai 201620, P.R.China
国际会议
2009 International Conference on Advanced Fibers and Polymer Materials(2009年先进纤维与聚合物材料国际学术会议)
上海
英文
660-662
2009-10-21（万方平台首次上网日期，不代表论文的发表时间）