Abstract
High modulus Poly (p-phenyleneterephalamide)(PPTA) fibers was prepared by heat drawing process, in which the fibers rearranged their structures for further improvements in their crystalline perfection, crystal line orientation. The modulus of PPTA fibers could be improved when fibers treated in an appropriate condition. The influences of heat treating time on the structures of the fibers and their properties were investigated by using two-dimensional wide-angle scattering (WAXS).
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