Abstract:Polypropylene (PP)/ethylene butene copolymer (EBM) blends were melt-spun into fibers. The fiber orientation was determined by wide angle diffraction (WAXS) and birefringence. The birefringence of the blend fibers was much lower than that of the pure PP or EBM filaments spun at the same stresses. WAXS study showed that the PP phase had the same orientation versus stress relationship in its blends and in its pure state. However, EBM phase demonstrated much lower birefringence in its blends than in its pure state… Show more
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