高强高模聚甲醛纤维的制备及其性能  

Preparation and properties of high strength and high modulus polyoxymethylene fibers

作　　者：黄廷健 牟浩 阳知乾 任红檠 徐建军[1,3] 刘鹏清[1] HUANG Tingjian;MOU Hao;YANG Zhiqian;REN Hongqing;XU Jianjun;LIU Pengqing(College of Polymer Science and Engineering,Sichuan University,Chengdu,Sichuan 610065,China;State Key Laboratory of High Performance Civil Engineering Materials,Nanjing,Jiangsu 210008,China;State Key Laboratory of Polymer Materials Engineering(Sichuan University),Chengdu,Sichuan 610065,China)

机构地区：[1]四川大学高分子科学与工程学院,四川成都610065 [2]高性能土木工程材料国家重点实验室,江苏南京210008 [3]高分子材料工程国家重点实验室(四川大学),四川成都610065

出　　处：《纺织学报》2018年第10期1-6,共6页Journal of Textile Research

基　　金：高性能土木工程材料国家重点实验室开放基金项目(2013CEM001)

摘　　要：为提升高强高模聚甲醛纤维的可纺性,通过研究聚甲醛树脂的流变行为和热稳定性确定了聚甲醛的熔融纺丝温度,研究聚甲醛树脂的等温结晶能力以确定聚甲醛初生纤维的超高倍热拉伸温度,并分析了卷绕速度、热拉伸倍数和热定型条件对聚甲醛纤维结晶度、取向度和力学性能的影响。结果表明:聚甲醛纤维的最佳熔融纺丝温度为215℃,其取向度、结晶度和力学性能随着卷绕速度的增加而增加;聚甲醛初生纤维的最佳热拉伸温度为155℃,极限拉伸倍数可达17倍,此时聚甲醛纤维的断裂强度为8.87 cN/dtex,初始模量为108.07 cN/dtex;初生纤维经过拉伸后结晶度和取向度提高,随着拉伸倍数增大,聚甲醛纤维的力学性能提高;聚甲醛初生纤维的最佳定型温度为145℃,定型时间为40～50 s。In order to improve the spinnability of polyoxymethylene(POM)fibers,the melt spinning temperature of POM was determined by studying the rheological behavior and thermal stability of POM resin.The isothermal crystallization ability of POM resin was studied to determine the ultra high thermal draw temperature of the primary fibers of POM,and the effects of winding speed,thermal drawing ratio and heat setting conditions on the crystallinity,orientation and mechanical properties of POM fibers were studied.The results show that the optimum melt spinning temperature of POM is 215℃,and the orientation,crystallinity and mechanical properties of POM fibers increase with the increase of winding speed.The optimum thermal drawing temperature of the primary fibers of POM is 155℃,and the limit drawing ratio of the thermal drawing can reach 17 times.At this time,the fracture strength of the POM fibers is 8.87 cN/dtex,and the initial modulus is 108.07 cN/dtex.After drawing the crystallinity and orientation of the POM fibers are increased,and the mechanical properties of the POM fibers increase with the increase of draw ratio.The optimum heat setting temperature is 145℃and the heat setting time is 40-50 s.

关 键 词：聚甲醛纤维 熔融纺丝 超高倍拉伸 可纺性 

分 类 号：TQ324.79[化学工程—合成树脂塑料工业]