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首页> 外文期刊>Journal of Applied Polymer Science >Effect of fine structure on fatigue resistance property of poly(ethylene terephthalate) tire cord fibers
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Effect of fine structure on fatigue resistance property of poly(ethylene terephthalate) tire cord fibers

机译：精细结构对聚对苯二甲酸乙二醇酯轮胎帘线纤维抗疲劳性能的影响

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摘要

Seven experimental poly(ethylene terephthalate) (PET) fibers were spun and then drawn under different processing conditions (i.e., spinning speed and draw ratio) in such a way that the fibers possessed different long periods but retained the same crystal structure. Wide angle X-ray diffraction, small angle X-ray scattering loss modulus, initial modulus, and taut tie molecules measurements were used to characterize the fine structure and the physical property of the fibers. The influence of the fine structure on the extensional fatigue behavior of the PET fibers was studied by subjecting them to 120-180 rpm at a repeated extension at 10(4)-10(6) cycles. In order to detect the molecular motion of PET with the extensional fatigue, we carried out differential scanning calorimetry, X-ray diffraction, density, and thermoluminescence (TL) experiments. The high temperature TL (above room temperature) intensity decreased with a 10(4) cycle extension but increased with a 10(5) cycle extension. The extent of change in the TL intensity was found to be a function of the long period and loss modulus. (C) 2000 John Wiley & Sons, Inc. [References: 26]
机译：将七种实验性聚对苯二甲酸乙二醇酯（PET）纤维纺丝，然后在不同的加工条件（即纺丝速度和拉伸比）下拉伸，以使纤维具有不同的长周期但保留相同的晶体结构。使用广角X射线衍射，小角X射线散射损耗模量，初始模量和绷紧的分子测量来表征纤维的精细结构和物理性质。通过在10（4）-10（6）个循环中反复拉伸120-180 rpm，研究了细微结构对PET纤维拉伸疲劳行为的影响。为了检测具有拉伸疲劳的PET分子运动，我们进行了差示扫描量热法，X射线衍射，密度和热致发光（TL）实验。高温TL（高于室温）强度随着10（4）个循环扩展而降低，但随着10（5）循环扩展而升高。发现TL强度的变化程度是长周期和损耗模量的函数。 （C）2000 John Wiley＆Sons，Inc. [参考：26]

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