Summary
Phase diagram obtained from small angle light scattering (SALS) and differential scanning calorimetry (DSC) of polypropylene/liquid paraffin blend system indicates that the melts undergo solid-liquid phase separation upon cooling and liquid paraffin is expelled out of crystalline region of polypropylene. Fibers spun under high take-up draw ratio are found to be hard-elastic. Long periods in the meridional direction are observed on the curves of small angle X-ray scattering (SAXS), and the yield point of fibers decreases with the increase in liquid paraffin content, which indicates such fibers have row-nucleated lamellar structure perpendicular to the fiber direction. The feasibility of preparing microporous membranes by stretching such fibers is investigated.
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Received: 12 May 1999/Revised version: 23 August 1999/Accepted: 25 August 1999
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Gu, B., Cao, Y., Du, Q. et al. Morphology of fibers formed via thermally induced phase separation of polypropylene and liquid paraffin blend in stress-field. Polymer Bulletin 43, 291–296 (1999). https://doi.org/10.1007/s002890050565
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DOI: https://doi.org/10.1007/s002890050565