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PTT/PET并列复合短纤维的卷曲和拉伸性能研究 总被引:2,自引:2,他引:0
对毛型聚对苯二甲酸丙二醇酯(PTT)/聚对苯二甲酸乙二醇酯(PET)并列复合短纤维进行卷曲和拉伸性能测试,对比分析了PTT/PET复合短纤、PTT/PET复合长丝和羊毛纤维的卷曲形态及卷曲性能,并通过实验探明处理PTT/PET短纤维的最佳时间和温度。实验结果表明,PTT/PET短纤的卷曲性能随温度的升高而变优,90℃时达到最佳,处理时间达到15min时,可使复合纤维卷曲性能达最佳状态。经过湿热处理后,PTT/PET并列复合短纤单位长度内的卷曲数明显增大,卷曲半径减小,三维卷曲形态更加明显。经过热处理的纤维,断裂强度和弹性模量下降,断裂伸长率增加。 相似文献
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以310 dtex/48 f聚对苯二甲酸乙二醇酯(PET)/聚对苯二甲酸丙二醇酯(PTT)复合预向丝为原料,经拉伸后得到PET/PTT复合纤维,探讨了拉伸工艺对PET/PTT复合纤维力学性能和卷曲性能的影响。结果表明:在卷绕速度为500 m/min,拉伸温度160℃,热定型温度150℃的条件下,随着拉伸倍数的增加,PET/PTT复合纤维的断裂强度、沸水收缩率、卷曲收缩率明显提高,断裂伸长率呈下降趋势,卷曲稳定度变化不明显;拉伸温度和热定型温度对PET/PTT复合纤维力学性能和卷曲性能的影响相对较小;拉伸过程中,控制拉伸倍数为1.95~2.00,拉伸温度为140~160℃,热定型温度为130~170℃,PET/PTT复合纤维性能较好。 相似文献
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首先采用自纺丝和企业中试丝两大系列18种聚对苯二甲酸丙二酯(PTT)/聚对苯二甲酸乙二酯(PET)双组分长丝,试制了18种机织物试样,并进行织物弹性测试,分析复合方式、PTT组分特性黏度和含量、热盘温度4个主要纺丝工艺参数对织物弹性的影响。试验发现,在采用板内复合纺丝方法,PTT和PET两组分特性黏度差较大,热盘温度高的纺丝条件下,织物的定力伸长率比较大;文献资料报道的PTT质量分数为50%时双组分纤维卷曲曲率及卷曲伸长率最大仅仅是某些条件下的试验结果,当PET与PTT弹性模量比(e)较大时,存在例外情况。 相似文献
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PET/PTT复合纤维卷缩性能的研究 总被引:5,自引:3,他引:2
通过对不同线密度的聚对苯二甲酸乙二醇酯/聚对苯二甲酸丙二醇酯(PET/PTT)复合纤维的热收缩率、卷曲收缩率、卷曲模量及卷曲稳定度的测试,研究了干热和沸水处理条件下的PET/PTT复合纤维的卷缩性能。结果表明:干热处理时,PET/PTT复合纤维的热收缩率随温度的升高而升高,随线密度的提高而减小;与干热处理比较,沸水加压处理后的纤维具有较好的热收缩率和卷曲性能。PET/PTT复合纤维线密度越低,其卷曲收缩能力越强,线密度为172 dtex时,纤维表现出较好的卷曲收缩率和卷曲稳定性。 相似文献
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采用测试分析和三元件力学模型模拟,系统地探讨了聚对苯二甲酸丙二酯(PTT)/羊毛混纺纱线的拉伸性能。与聚对苯二甲酸乙二酯(PET)/羊毛混纺纱相比,PTT/羊毛混纺纱在整个拉伸过程中表现出较低的拉伸模量,纱线的断裂强力约为PET/羊毛混纺纱的2/3,断裂伸长率为PET/羊毛混纺纱的1.4倍。三元件力学模型能够很好地模拟PTT/羊毛和PET/羊毛混纺纱的拉伸曲线。 相似文献
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The instantaneous elastic recoveries of poly(trimethylene terephthalate) (PTT), PET, and PBT filaments were comparatively analyzed by a tensile testing machine. The conditions of the measurement were studied and the mechanism of instantaneous elastic recovery of these three aromatic polyester filaments is discussed. The instantaneous elastic recovery of PTT filaments was significantly higher than those of PBT and PET filaments. Moreover, PTT filaments had a high instantaneous elastic recovery even at a high elongation of 20%. The outstanding instantaneous elastic recovery of PTT filaments resulted from its helical conformation in crystal lattice, which responded immediately to the applied stress and deformed as though it was a coiled spring; we suggest it was a quasispring elastic recovery mechanism. When we measured the instantaneous elastic recovery of, PTT filaments with the tensile testing machine, it was appropriate to set up the crosshead speed at 500 mm/min with an elongation of 20% and a load of 0.5 cN/tex. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 91: 1967–1975, 2004 相似文献
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PTT长丝瞬时拉伸回弹性能研究 总被引:11,自引:2,他引:11
在相同条件下对比研究了PET ,PTT和PBT 3种芳香族聚酯长丝的瞬时拉伸回弹性能 ,分析了测定条件对PTT长丝瞬时拉伸回弹性能的影响 ,并初步讨论了 3种芳香族聚酯长丝的瞬时拉伸回弹机理。结果表明 ,PTT长丝的瞬时拉伸回弹性能明显优于PBT长丝 ,更优于PET长丝 ,PTT长丝在低伸长率和高伸长率下均具有优异的瞬时拉伸回弹性能 ;测定PTT长丝瞬时拉伸回弹率时 ,建议采用 0 .5cN/tex的预张力 ,5 0 0mm/min的拉伸速率和 2 0 %的定伸长率等条件 相似文献
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Hantao Zou Luoxin Wang Changhai Yi Hongtao Liu Weilin Xu 《Polymer Engineering and Science》2010,50(8):1689-1695
The thermal and rheological properties of poly(ethylene‐co‐trimethylene terephthalate) (PETT) copolymer are investigated. The thermal behavior of PETT copolymers is dependent on the composition. The PETT‐15 and PETT‐85 copolymers can crystallize, whereas the PETT‐30 copolymer cannot crystallize at 5°C/min cooling rate. The copolymers have a good thermal stability, even though the addition of poly(trimethylene terephthalate) (PTT) chain causes a disadvantage to the thermal stability of the copolymers. Moreover, the PETT copolymers are a typical pseudoplastic fluid exhibiting shear thinning. With increasing the shear rate or the content of PTT units, the flow activation energy decreases and the sensitivity of the shear viscosity to the melt temperature declines. The PETT copolymer filaments have intermediate elastic recovery and dyeability between poly(ethylene terephthalate) (PET) and PTT filaments. With increasing the PTT content, the elastic recovery and dyeability of PETT copolymer filaments increase. That is to say, introducing PTT units as a minor component into the macromolecular chains is an available means to improve the properties of PET filament. The obtained PETT copolymer filaments blend the advantage of the mechanical property of PET and the elastic and dyeability of PTT filament together into one polymer and possess a softer feeling and a higher extension. POLYM. ENG. SCI., 50:1689–1695, 2010. © 2010 Society of Plastics Engineers 相似文献