Initial Stage of Fiber Structure Development in the Continuous Drawing of Poly(ethylene terephthalate)

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This is a preprint of an article published in Journal of Polymer Science: Part B: Polymer Physics. 46(19): 2126-2142 (2008).The initial stage of fiber structure development in the continuous neckdrawingof amorphous poly(ethylene terephthalate) fibers was analyzed by in situwide-angle X-ray diffraction, small-angle X-ray scattering, and fiber temperaturemeasurements. The time error of the measurements (\600 ls) was obtained by synchrotronX-ray source and laser irradiation heating. A highly ordered fibrillar-shapedtwo-dimensional (smectic-like) structure was found to be formed less than 1 ms afternecking. By analyzing its (0010) and (0020) diffractions, the length of the structure60–70 nm were obtained. A three-dimensionally ordered triclinic crystal began toform with the vanishing of the structure around 1 ms after necking. The amount andsize of the crystal were almost saturated within several milliseconds of necking, duringwhich time a mainly exothermic heat of crystallization was also observed.
Wiley Periodicals, Inc.の論文
2008-08-27