PA6纤维热稳定性研究  

Study on the Thermal Stability of PA6 Fibers

作　　者：李文武[1] 戴宏翔 孙岩峰 陈海相[1] 林型跑 谢甲增 LI Wenwu;DAI Hongxiang;SUN Yanfeng;CHEN Haixiang;LIN Xingpao;XIE Jiazeng(National Engineering Lab for Textile Fiber Materials&Processing Technology(Zhejiang),Zhejiang Sci-Tech University,Hangzhou 310018,China;Hangzhou Institute of Testand Calibration for Quality and Technology Supervision,Hangzhou 310019,China;Zhejiang Jihua Group Co.,Ltd.,Hangzhou 311228,China)

机构地区：[1]浙江理工大学纺织纤维材料与加工技术国家地方联合工程实验室,杭州310018 [2]杭州市质量技术监督检测院,杭州310019 [3]浙江吉华集团股份有限公司,杭州311228

出　　处：《现代纺织技术》2018年第3期13-17,共5页Advanced Textile Technology

基　　金：浙江省质监系统科研项目(20150234)

摘　　要：采用热重分析(TG)和热裂解气质联用(Py-GC/MS)研究了PA6纤维的热稳定性和热裂解机理。通过热重实验中PA6纤维的质量保留率和温度的关系,得到热降解温度及热降解活化能,进一步通过热裂解实验对PA6纤维的热降解产物进行了分析。结果表明:PA6纤维在氮气中的热降解过程为一步反应,特征起始降解温度和特征终止降解温度分别为409.2℃和448.6℃,热降解活化能为199.4kJ/mol,热稳定性良好。PA6纤维的热裂解产物主要是己内酰胺,含量达58.76%,属拉链式开裂解聚机理。The thermal stability and pyrolysis mechanism of PA6 fibers were investigated by thermogravimetry(TG)and pyrolysis-gas chromatography/mass spectrometer(Py-GC/MS).Through thermal gravimetric experiments of PA6 fibers,the thermal degradation temperature and thermal degradation activation energy were obtained.The thermal degradation products of PA6 fibers were further analyzed by pyrolysis experiments.The results showed that the thermal degradation process of PA6 fibers in nitrogen was one step reaction and the thermal degradation activation energy was 199.4 kJ/mol.The characteristics of the initial degradation temperature and the characteristic termination degradation temperature were 409.2℃and 448.6℃respectively,and its thermal stability was good.The main thermal pyrolysis products of PA6 fibers was caprolactam,up to 58.76%.A zippered depolymerization pyrolysis mechanism was proposed to describe the pyrolysis of PA6 fibers.

关 键 词：PA6纤维 热稳定性 裂解机理 

分 类 号：TQ342.1[化学工程—化纤工业]