对位芳纶纤维热降解性能研究  

Analysis and research of para-aramid fiber's thermo degradation

作　　者：朱正锋[1] 齐大鹏[1] 韩倩[1] 李会改[1] 

机构地区：[1]河南省功能性纺织材料重点实验室(中原工学院),河南郑州451191

出　　处：《上海纺织科技》2011年第10期18-20,共3页Shanghai Textile Science & Technology

基　　金：河南省基础与前沿技术研究项目(102300410032)

摘　　要：以中国神马集团有限责任公司生产的对位芳纶纤维和美国杜邦生产的Kevlar 49纤维为实验材料,通过高温恒湿条件持续不同时间段的断裂强力变化来表征芳纶纤维的热降解性能,并利用纤维分子量、聚合度和红外光谱分析研究实验前后纤维结构变化引起力学性能变化的原因。实验表明,两种纤维的主要组成成分相同,经过持续的高温处理后,纤维的分子量、聚合度、断裂强力和氢键结合力均呈下降趋势,对纤维起到了一定的降解作用。Taking aramid 1414 fiber made in China and Kevlar49 fiber made in the USA as experimental materials, the thermal degradation was represented by the differences of breaking strength of the fibers in different time in constant temperature and humidity. And the molecular weight, degree of polymerization and infrared spectrum were used to analyse the structure＇ s differences to find the causes of changes of the fiber＇ s mechanical properties before and after the experiments. Experiment results show that the molecular weight, degree of polymerization, breaking strength and hydrogen bond forces of the two fibers with same main components were all dropped with the time increasing in continuous high-temperature processing. Certain degradation of PPTA fibers by high-temperature processing is demonstrated.

关 键 词：对位芳纶 分子量 聚合度 热降解 红外光谱法 

分 类 号：TS102.527.5[轻工技术与工程—纺织工程]