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趙龍錫 대구효성가톨릭대학교 1980 연구논문집 Vol.22 No.2
Polycaprolactam fibers were hydrolysed with 1.0 to 2.0N hydrochloric acid and the effect of hydrolytic conditions on properties of the fibers were examined. The fiber did not show any significant changes in the weight. moisture regain, strength and elongation by varing the acid concentration and the hours of hydrolysis. However, these properties of the fiber were apparently changed by rising the hydrolytic temperature up to 70℃. When the fibers were hydrolysed for 7.5 hours at 70℃ with refluxing the acid(2.0N), they showed a remarkable decrease in moisture regain. They lost a 2.9 per cent of initial weight and they showed a 60 per cent decrease in strength and elongation against control. On contraly, when the fibers were hydrolysed under 60℃, they showed only a 1.7 per cent of weight loss, 1.0 per cent increase in moisture regain and 30 per cent decrease in strength and elongation. It is clear from above results that acid hydrolysis of polycaprolactam fiber at high temperature(above 70℃) drastically disturbes physical properties of the fiber.