乙烯-四氟乙烯共聚纤维的性能  

Properties of ethylene-tetrafluoroethylene copolymer fibers

作　　者：孙乐乐[1] 肖长发[1] 潘健[1] 赵健[1] 陈凯凯[1] SUN Lele XIAO Changfa PAN Jian ZHAO Jian CHEN Kaikai(School of Textiles, Tianjin Polytechnic University, Tianjin 300387, Chin)

机构地区：[1]天津工业大学纺织学院,天津300387

出　　处：《纺织学报》2016年第12期6-11,共6页Journal of Textile Research

摘　　要：为实现乙烯-四氟乙烯(ETFE)共聚纤维工业规模开发,通过熔融纺丝法制备了ETFE共聚初生纤维,并将初生纤维在150℃条件下通过电子拉伸试验机进行定长拉伸,得到拉伸比为100%和200%的纤维。利用热重分析仪、差示扫描量热分析仪、X射线衍射仪、动态热机械分析仪和电子拉伸机等分别测试了纤维的热性能、结晶结构、力学性能。测试得出:ETFE共聚热分解温度约为477℃;不同拉伸倍率纤维的熔融温度均保持在259℃左右;拉伸200%纤维断裂强度约为160 MPa,是初生纤维的3倍。结果表明:随拉伸倍率的提高,ETFE共聚纤维玻璃化转变温度提高9℃,结晶度和晶区取向度分别提高了10.2%和5.5%;经浓硫酸、氢氧化钠溶液、丙酮和次氯酸钠试剂处理后各纤维断裂强度均无明显变化,表现出良好的耐化学试剂性能。In order to achieve the development of industrial scale of ethylene-tetrafluoroethylene（ ETFE）copolymer fibers,ETFE copolymer as-spun fibers were prepared by melt spinning,and were stretched by an electronic tensile testing machine at 150 ℃ to obtain fibers with the stretch ratio of 100% and 200%,respectively. Thermal properties,crystal structure and mechanical properties of fibers were researched by thermogravimetric analyzer（ TG）, differential scanning calorimeter（ DSC）, X-ray diffractometer（ XRD）,dynamic mechanical analyzer（ DMA） and electronic tensile testing machine,respectively. The results show that the thermal decomposition temperature of ETFE copolymer is about 477 ℃. The melting temperatures of fibers of different draw ratio are all about 259 ℃. The breaking strength of fibers stretched by 200% is 160 MPa,which is close to three times of as-spun fibers. The DMA and XRD results indicate that with the increasing of the stretch ratios,glass transition temperature of ETFE copolymer fibers is increased by 9 ℃. In the meantime,the crystallinity and orientation improved by 10. 2% and 5. 5%respectively. Besides,the breaking strength of all kinds of fibers has no obvious change after treating with H_2SO_4,NaOH,acetone and NaClO,which shows the excellent resistance to chemical reagents.

关 键 词：乙烯-四氟乙烯共聚物 熔融纺丝成形 拉伸比 纤维结构 纤维性能 

分 类 号：TQ342.71[化学工程—化纤工业]