摘要
通过热失重(TG)及差示扫描量热分析(DSC),对聚乳酸纤维与涤纶的热学性能进行对比测试,同时还测试了聚乳酸纤维的热收缩率和极限氧指数。结果表明:随着温度升高,聚乳酸纤维的TG-DTG曲线有2个失重台阶,在330℃左右开始热分解,主失重温度约为360℃;聚乳酸纤维的DSC曲线呈现出双熔融峰,较低熔融峰为161.6℃,较高熔融峰为169.9℃;聚乳酸纤维的沸水收缩率和干热空气收缩率分别为12%和4.5%;聚乳酸纤维的极限氧指数为27%。
TG and DSC are used to analyze the thermal property of polylactic acid(PLA) fibers and compared with polyester(PET) fibers.The heat shrinkage and limited oxygen index of the PLA fibers are also tested.The investigation showes that as the temperature increases,the PLA fibers′ TG curves appear two weight loss bands.It begins to decompose at about 330 ℃,and the main weight loss temperature is about 360 ℃.Compared with PET fibers,the PLA fibers′ DSC curve appears double melting peaks.The higher melting peak appears at 169.9 ℃,and the lower one appears at 161.6 ℃.The heat shrinkages of PLA fibers in boiling water and hot air are 12 % and 4.5 % respectively.The limited oxygen index of the PLA fiber is 27 %.
出处
《合成纤维》
CAS
2012年第11期23-26,共4页
Synthetic Fiber in China
