Abstract
A detailed method is reported for deriving the lattice distortions and crystallite sizes of ultra-high molecular weight polyethylene (UHMWPE) fibers employing a full wide angle X-ray diffraction (WAXD) pattern. The predominant crystals are orthorhombic form and the refined unit cell dimensions for a and b are 7.40(±0.03) and 4.94(±0.03) A, respectively. The average crystallite size normal to 110 planes was found to be in the range of 163–182 A. The microstrain lattice distortion was predominant in the gel-spun UHMWPE fibers, with the lattice constant variation of 0.5%.
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