Structure Development in the Laser Drawing Process of Poly(ethlene terephthalate) Fiber Analyzed by Milliseconds‘ Time-resolution WAXD/SAXS Measurements

关键词：

WAXD/SAXS Laser Drawing Process

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新产业 >> 信息材料/技术

来源：

2005年新型纤维与聚合物材料国际学术会议（2005.10.19-21 上海）

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Fiber structure development in the poly (ethlene terephehalate ) fiber drawing process was investigated by wide-angle and small-angle x-ray scattering （WAXD / SAXS）on-line measurement. For the purpose, both high luminance x-ray source and carbon dioxide laser-heated-drawing system were applied. By the change of transmission x-ray intensity, the position of neck-like deformation was confirmed. Because the fluctuation of the position was less than 1.2 mm, the obtained diffraction images had a time-resolution of several milliseconds [1]. By increasing the fiber running speed, we have succeeded to get 0.7 milliseconds’ time-resolution. The crystal diffraction appeared in the WAXD images at about 20 ms after neck-like deformation, whereas the four-point SAXS pattern appeared immediately after neck-like deformation. With the increase of elapsed time after neck-like deformation, the meridional four-point scattering pattern changed into the two-point shape.

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2007-07-23 17:47:03

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