聚乳酸纤维的定性鉴别及性能测试  

Qualitative identification and performance test of polylactic acid fiber

作　　者：吉利梅[1] 

机构地区：[1]南通纺织职业技术学院,江苏南通226007

出　　处：《印染助剂》2012年第10期49-52,共4页Textile Auxiliaries

摘　　要：采用燃烧法、显微镜观察法、熔点法、溶解法和红外吸收光谱法对聚乳酸纤维进行了试验研究,并与普通涤纶纤维进行了比较分析.结果表明：聚乳酸纤维离开火焰燃烧时有独特的透明蓝色火焰,并有熔液连续下滴,其残渣为极少量淡黄色胶状物;纵向形态呈现较深的横向沟槽,截面形态为近似圆形,有明显的孔洞和裂缝;熔点范围为171~178℃;在煮沸后的88%甲酸、65%~68%硝酸溶液中立即溶解;在1 300~1 470 cm-1和1 030~1 210 cm-1指纹区的峰位和峰的数目与涤纶纤维有较大的差异;其制品与涤纶纤维制品同样具有较好的挺括性、韧性和耐疲劳性;抱合力、残留卷曲率优于涤纶纤维,但平滑性、卷曲的恢复能力比涤纶纤维差.Polylactic acid fiber was studied by combustion method,microscopic observation method,melting point method,dissolution method and infrared absorption spectroscopy,and compared with the com mon polyester fiber.The results showed that： polylactic acid fiber had a unique transparent blue burning flame when it left the flame,and a molten liquid continuous dropped,the residues were a very small amount of pale yellow jelly.The longitudinal morphology of polylactic acid fiber presented deep transverse grooves,the cross sectional shape was approximately circular,and had apparent pores and cracks.The melting point range of polylactic acid fiber was 171~178 ℃,and the fiber dissolved in the boiled 88% formic acid and 65%~68% of nitric acid immediately.The polylactic acid fiber had big difference from polyester fiber in peak position and the peak numbers at 1 300~1 470 cm-1 and 1 030~1 210 cm-1 fingerprint area.Polylactic acid fiber product had similar good shape stability,tenacity and fatigue endurance with polyester fiber,the hold force and the re sidual crimp percentage of polylactic acid fiber were better than polyester fiber,but the smoothness and crimp recovery capacity were worse than the polyester fiber.

关 键 词：聚乳酸纤维 比较分析 定性鉴别 

分 类 号：TQ341.5[化学工程—化纤工业] TQ317.5