聚乳酸/聚乙二醇共混材料的性能研究  

Study on the properties of poly(lactic acid)/poly(ethylene glycol) blends

作　　者：吴选军[1] 袁继祖[2] 余永富[2,3] 周月[1] 

机构地区：[1]武汉理工大学化学工程学院,湖北武汉430070 [2]武汉理工大学资源与环境工程学院,湖北武汉430070 [3]长沙矿冶研究院,湖南长沙410012

出　　处：《武汉工程大学学报》2009年第5期60-63,共4页Journal of Wuhan Institute of Technology

摘　　要：通过溶液共混法制备了PLA/PEG共混材料,对其力学性能、热性能和生物降解性能等进行测试.结果表明,随着PEG添加量的逐渐增加,PLA/PEG共混材料的断裂伸长率均大幅度提高,但拉伸强度逐渐降低,弹性模量也呈下降趋势;同时,PLA/PEG共混材料的Tg逐渐下降,聚乳酸分子链间作用力减弱,常温塑性增强,而PEG添加量对其熔点Tm影响不大,熔融焓却随之增大;添加PEG能提高聚乳酸在土壤中的水解速率,从而加快其降解速率.PLA/PEG blends were prepared by solution blending. Their mechanical properties, thermal properties and biodegradability were investigated. The results showed that their elongation at break gradually increased with the addition of PEG, but that their tensile strength and their modulus of elasticity gradually reduce with the addition of PEG. At the same time, Tg of PLA / PEG blends decreased, the interaction between macromoleeular chains of poly （lactic acid） weakened, their plasticities at room temperature increased. The content of PEG took almost no effect on their melting points. But their melting enthalpy increased with the amount of PEG. Their biodegradation rate would speed up with the addition of PEG because PEG could improve the hydrolysis rate of poly（lactic acid） in the soil.

关 键 词：聚乳酸 聚乙二醇 共混材料 力学性能 热性能 生物降解性能 

分 类 号：TQ322[化学工程—合成树脂塑料工业]