抄録
The molecular orientation behavior and crystallinity of laser-heated drawn poly (ethylene terephthalate) fiber was analyzed by DSC, FTIR-ATR, WAXD, density, and refractive indices measurements. Trans-conformation and crystallinity increased with draw ratio. Fixed length annealing increased crystal orientation and fold-band fraction for all fibers. By the annealing, birefringence and the orientation of crystal c-axis to fiber axis were increased for four times drawn fibers, while they were decreased for six times drawn fibers. The big decrease of gauche-conformation by the annealing was observed for the fiber drawn to six times with the minimum laser power for stable drawing.
