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首页> 外文期刊>Journal of Applied Polymer Science >MEASUREMENT OF AMORPHOUS ORIENTATION IN POLY(ETHYLENE TEREPHTHALATE) FIBERS BY X-RAY DIFFRACTION AND ITS SIGNIFICANCE
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MEASUREMENT OF AMORPHOUS ORIENTATION IN POLY(ETHYLENE TEREPHTHALATE) FIBERS BY X-RAY DIFFRACTION AND ITS SIGNIFICANCE

机译：X射线衍射法测量聚对苯二甲酸乙二酯纤维中非晶态的取向及其意义

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摘要

The orientation of the noncrystalline (amorphous) phase in poly (ethylene terephthalate) fibers is analyzed by separating the amorphous scattering in the wide-angle x-ray diffraction patterns into isotropic and anisotropic components. Two parameters are used to characterize the amorphous orientation-the fraction of the anisotropic component and its degree of orientation. The x-ray amorphous orientation parameters are compared with the sonic modulus and the birefringence values. Our results illustrate that the intrinsic birefringence of the amorphous phase is not ''intrinsic'' but depends on its density. The role of the oriented amorphous phase in determining the strength (tenacity) and the dimensional stability (shrinkage) of the fibers is discussed. We conclude that although amorphous orientation determines the shrinkage, other factors such as the connectivity between the amorphous phase and the crystalline regions play an important role in determining the tenacity of the fibers. (C) 1997 John Wiley & Sons, Inc. [References: 24]
机译：通过将广角X射线衍射图中的无定形散射分为各向同性和各向异性成分，可以分析聚对苯二甲酸乙二酯纤维中非晶态（非晶态）的取向。使用两个参数来表征非晶取向-各向异性组分的比例及其取向度。将X射线非晶取向参数与声波模量和双折射值进行比较。我们的结果表明，非晶相的固有双折射不是“本征”的，而是取决于其密度。讨论了定向非晶相在确定纤维的强度（强度）和尺寸稳定性（收缩率）方面的作用。我们得出的结论是，尽管非晶取向决定了收缩率，但其他因素（如非晶相与晶体区域之间的连通性）在确定纤维的韧性方面起着重要作用。 （C）1997 John Wiley＆Sons，Inc. [参考：24]

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