聚碳化二亚胺对聚乳酸抗水解性能的影响  

Effect of Polycarbodiimide on Hydrolytic Resistance of Poly(lactic acid)

作　　者：张杰[1] 苏思玲[2] 代巧玉[2] 任宜辰[2] 李瑞海[1] 杨斌[2] 

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065 [2]上海交通大学化学化工学院,上海200240

出　　处：《塑料工业》2008年第4期39-42,54,共5页China Plastics Industry

摘　　要：主要研究加入不同质量分数(0.3%、0.6%、1.0%、2.0%)抗水解剂聚碳化二亚胺(PCI)的聚乳酸(PLA)在95℃热水中水解0、1、2、4、8h后的水解性能。通过端羧基滴定法、凝胶色谱法(GPC)、流变稳态扫描、差示扫描量热测定法(DSC)和拉伸性能测试对水解前后的样品性能进行了研究。结果发现:聚碳化二亚胺是聚乳酸有效的抗水解剂,抗水解性能随着抗水解剂添加量的增加而增强。The hydrolytic resistance of poly（lactic acid）（PLA）with different mass fractions （0.3%, 0.6%, 1.0%, 2.0% ） of hydrolytic resistance agent polycarbodiimide in 95 ℃ water for 0, 1, 2, 4, 8 h was studied. The concentration of -COOH group of PLA after hydrolysis was measured by titrimetric methods. The changes of molecular weight, thermal behavior, shear viscosity were studied by gel permeation chromatography （GPC）, DSC and rheometer, respectively, tensile strength was also assessed by universal tester. It was found polycarbodiimide was an effective hydrolytic resistance agent for PLA, and the hydrolytic resistance upgraded with the increase of the content of the hydrolytic resistance agent.

关 键 词：聚乳酸 聚碳化二亚胺 抗水解性能 

分 类 号：TQ317[化学工程—高聚物工业]