Effect of melt spinning conditions on the fiber structure development of polyethylene terephthalate
Effect of melt spinning conditions on the fiber structure development of polyethylene terephthalate
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DOI：
10.1016/j.polymer.2016.12.077
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发表时间：
2017-05-05
期刊：
影响因子：
4.6
通讯作者：
Maeda, Y.
中科院分区：
文献类型：
--
作者：
Tomisawa, R.;Ikaga, T.;Maeda, Y.
纺丝条件对纤维性能的影响无法通过纤维结构得到很好的解释，因为双折射、结晶度和 SAXS 图案通常相似。在本研究中，通过同步 WAXD/SAXS 测量分析了缩颈后对聚对苯二甲酸乙二醇酯纤维结构发展的影响。对于以最小拉伸比拉伸的所有纤维，观察到 X 形 SAXS 图案。相比之下，通过在100 MPa的拉伸应力下进行拉伸，对于以500-1500 m/min纺丝的纤维，观察到近晶相的强烈衍射以及在颈缩后小于1 ms的明显较大的长周期，而对于以2000 m/min纺丝的纤维，几乎没有观察到近晶相。对于以 2000 m/min 纺丝的纤维，还观察到较高的结晶速率和结晶速率的明显拉伸比依赖性。结构发展的明显差异可以解释它们在拉伸强度和热收缩方面的差异。 (C) 2017 Elsevier Ltd. 保留所有权利。
The effects of spinning conditions on fiber properties are not well explained by the fiber structures because the birefringence, crystallinity, and SAXS patterns are often similar. In this study, the effects on the fiber structure development of polyethylene terephthalate after necking was analyzed by simultaneous WAXD/SAXS measurements. An X-shaped SAXS pattern was observed for all fibers drawn at the minimum draw ratio. In contrast, by drawing under a drawing stress of 100 MPa, the strong diffraction of the smectic phase and an obviously larger long period less than 1 ms after necking were observed for fibers spun at 500-1500 m/min, while almost no smectic phase was observed for fibers spun at 2000 m/min. A higher crystallization rate and clear draw ratio dependence of crystallization rate were also observed for the fiber spun at 2000 m/min. The clear differences in structure development can explain their differences in tensile strength and thermal shrinkage. (C) 2017 Elsevier Ltd. All rights reserved.