高强高模聚甲醛纤维的制备及其性能
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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.
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.
引文
[1] 王桦,陈丽萍,覃俊. 聚甲醛纤维的全球新进展[J]. 非织造布,2012(5):22-25.WANG Hua,CHEN Liping, QIN Jun. Global progress in polyoxymethylene fibers[J]. Nonwovens, 2012(5):22-25.
[2] 王新雷,王焕莲,吴思蝶,等. 聚甲醛纤维制备工艺及其性能的研究[J]. 合成纤维,2010,39(8):7-11.WANG Xinlei, WANG Huanlian, WU Sidie, et al. Preparation of polyoxymethylene fiber and its properties study[J]. Synthetic Fiber in China,2010,39(8):7-11.
[3] 陈丽萍,王桦,覃俊,等. 聚甲醛纤维的制备与性 能[J]. 合成纤维,2016,45(3):24-28.CHEN Liping, WANG Hua, QIN Jun, et al. Preparation and properties of POM fiber[J]. Synthetic Fiber in China,2016,45(3):24-28.
[4] WANG Yatao,ZHAO Weiwei, WANG Xiaodong, et al. Preparation, mechanical properties and microstructure of polyoxymethylene fiber through melt spinning and hot drawing by using injection-molding grade resins[J]. Fibers and Polymers,2016,17(9):1464-1474.
[5] WILLIAMS G A. Process for preparing high tenacity polyoxymethylene fibers: 3536219[P]. 1970-10-27.
[6] KIKUTANI Takeshi. Method for the production of polyoxymethylene fibers:1431428B1[P]. 2008-12-24.
[7] 文珍稀,叶敏,彭刚,等. 聚甲醛纤维的制备及其力学性能研究[J]. 合成纤维,2011(1):24-27,54.WEN Zhenxi, YE Min, PENG Gang, et al. Study on preparation and mechanical property of POM fiber[J]. Synthetic Fiber in China,2011(1):24-27,54.
[8] 尤秀兰,胡盼盼,刘兆峰. 高强有机合成纤维的结构形成[J]. 纺织学报,2010,31(5):146-152.YOU Xiulan, HU Panpan, LIU Zhaofeng. Structure of high strength organic synthetic fibers[J]. Journal of Textile Research,2010,31(5):146-152.
[9] 黄彬,郯志清. 有机高性能纤维的进展[J]. 纺织学报,1992,13(8):42-44.HUANG Bin, TAN Zhiqing. Progress in organic high performance fibers[J]. Journal of Textile Research,1992,13(8):42-44.
[10] HU Youliang, YE Lin. Nucleation effect of polyamide on polyoxymethylene[J]. Polymer Engineering and Science, 2005,45(8):1174-1179.
[2] 王新雷,王焕莲,吴思蝶,等. 聚甲醛纤维制备工艺及其性能的研究[J]. 合成纤维,2010,39(8):7-11.WANG Xinlei, WANG Huanlian, WU Sidie, et al. Preparation of polyoxymethylene fiber and its properties study[J]. Synthetic Fiber in China,2010,39(8):7-11.
[3] 陈丽萍,王桦,覃俊,等. 聚甲醛纤维的制备与性 能[J]. 合成纤维,2016,45(3):24-28.CHEN Liping, WANG Hua, QIN Jun, et al. Preparation and properties of POM fiber[J]. Synthetic Fiber in China,2016,45(3):24-28.
[4] WANG Yatao,ZHAO Weiwei, WANG Xiaodong, et al. Preparation, mechanical properties and microstructure of polyoxymethylene fiber through melt spinning and hot drawing by using injection-molding grade resins[J]. Fibers and Polymers,2016,17(9):1464-1474.
[5] WILLIAMS G A. Process for preparing high tenacity polyoxymethylene fibers: 3536219[P]. 1970-10-27.
[6] KIKUTANI Takeshi. Method for the production of polyoxymethylene fibers:1431428B1[P]. 2008-12-24.
[7] 文珍稀,叶敏,彭刚,等. 聚甲醛纤维的制备及其力学性能研究[J]. 合成纤维,2011(1):24-27,54.WEN Zhenxi, YE Min, PENG Gang, et al. Study on preparation and mechanical property of POM fiber[J]. Synthetic Fiber in China,2011(1):24-27,54.
[8] 尤秀兰,胡盼盼,刘兆峰. 高强有机合成纤维的结构形成[J]. 纺织学报,2010,31(5):146-152.YOU Xiulan, HU Panpan, LIU Zhaofeng. Structure of high strength organic synthetic fibers[J]. Journal of Textile Research,2010,31(5):146-152.
[9] 黄彬,郯志清. 有机高性能纤维的进展[J]. 纺织学报,1992,13(8):42-44.HUANG Bin, TAN Zhiqing. Progress in organic high performance fibers[J]. Journal of Textile Research,1992,13(8):42-44.
[10] HU Youliang, YE Lin. Nucleation effect of polyamide on polyoxymethylene[J]. Polymer Engineering and Science, 2005,45(8):1174-1179.