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이래연,송본희대 한국섬유공학회 1990 한국섬유공학회지 Vol.27 No.10
An uniaxial stretching was conducted by swell-wet stretching process in three different swelling agents (DMI, DMF, DMSO) to investigate stretching effect for indrawn aramid fiber (Technora) . The degree of swelling was increased with concentration of swelling agent and the most suitable concentration and treating time were 70% and 20 min., respectively. The breaking stress of aramif fiber was slowly decreased with concentration of swelling ;igent, but breaking strain was increased to the concentration 709 and decreased above. The result of stretching treatment for aramid fibers was showed that the orientation of fine structure, tensile strength and Young's modulus were increased with increasing drawing ratio, meanwhile breaking elongation was an opposite trend.
포르말화 폴리비닐 알콜 필름의 수중 연신 구조와 기계적 성질에 관한 연구
김양수,이광배,송본희대,Kim, Yang-Su,Lee, Gwang-Bae 한국섬유공학회 1990 한국섬유공학회지 Vol.27 No.11
The formalized poly(vinyl alcohol)films were uniaxially drawn in water and the following conclusions are drawn on the basis of the experimental results. 1. From the results of toughness test to evaluate the workability of samples, the 7.08 mole % formalized film was the toughest among all samples. 2. The equilibrium swelling time of formalized poly(vinyl alcohol)films in water was 10 min. when it was measured at the drawing condition in water. 3. On the basis of molecular orientation measured, the orientation of crystalline region made a great contribution to the total orientation whereas that of amorphous region showed less then 0.1. 4. Wigh increasing formalization, and the elasticity were increased slightly but the toughness was decreased greatly.