聚四氟乙烯短纤维的热及化学稳定性研究  

Study on thermal and chemical stability of PTFE staple fiber

作　　者：姜兆辉[1] 徐瑞乐 郭增革[1] 贾瞾[1] 李志迎[1] 肖长发[2] 金剑[3] Jiang Zhaohui Xu Ruidong Guo Zengge Jia Zhao Li Zhiying Xiao Changfa Jin Jian(Department of Textile and Apparel,Shandong University of Technology,Zibo 255049 Key Laboratory of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, Tianjin 300387 State Key Laboratory of Biobased Fiber Manufacture Technology, China Textile Academy, Beijing 100025)

机构地区：[1]山东理工大学鲁泰纺织服装学院,淄博255049 [2]天津工业大学改性与功能纤维天津市重点实验室,天津300387 [3]中国纺织科学研究院生物源纤维制造技术国家重点实验室,北京100025

出　　处：《化工新型材料》2016年第12期68-70,73,共4页New Chemical Materials

基　　金：科技部国家科技支撑计划(2013BAE01B03);山东省自然科学基金(ZR2014EMP004);生态纺织教育部重点实验室(江南大学)(KLET1401);山东省高等学校科技计划项目(J14LA56);山东理工大学博士科研启动基金(4041-413047)

摘　　要：通过表观形态观测,得出聚四氟乙烯(PTFE)短纤维的直径服从高斯分布。针对细度差异性较大的PTFE短纤维,提出一种基于线密度差异性的单根纤维追踪测量法,用于测试酸碱处理前后纤维的力学性能。结果表明,经常温酸碱处理后,纤维断裂强度基本无变化,而初始模量减小,断裂伸长率增大;高温酸碱处理后的纤维断裂强度略有增大而断裂伸长率减小;经干热空气和沸水处理后,纤维的断裂强度基本无变化,而断裂伸长率由于解取向略有降低。此外,热失重分析表明PTFE短纤维具有优异的耐高温性能。The diameter and Gauss distribution of PTFE staple fiber were obtained by observing the longitudinal morphology of the fiber. For the great CV value of PTFE staple fiber, a tracking measurement method based on different line density of single fiber was proposed to test mechanical properties of fibers before and after treatment. After treated by acid and alkali under normal temperature, the breaking tenacity of fiber was almost unchanged, while the tensile modulus decreased and the elongation at break increased. The breaking tenacity of fiber slightly increased and the elongation at break decreased after treating by acid and alkali under high temperature. After treating by hot air and boiling water,the breaking tenacity of fiber varied little and the elongation at break slightly decreased due to disorientation. In addition, TG analysis showed that PTFE staple fiber had excellent high temperature resistance.

关 键 词：聚四氟乙烯 短纤维 热稳定性 化学稳定性 

分 类 号：TQ342.711[化学工程—化纤工业]