Studies on the Modification of Poly(ethylene Terephthalate) Film Treated with Hydrazine Hydrate in Methanol

히드라진/메탄올 용액처리에 의한 폴리에틸렌 테레탈레이트 필름의 개질에 관한 연구

In order to impart dyeability of PET film toward acid dyes, PET film was aminolyzed with 20%, 25%, 30% and 35% hydrazine hydrate in methanol at 30℃ for various time intervals. The changes of properties such as dyeability toward acid dyes, hydrazide end group content, weight loss, surface morphology, viscoelastic properties caused by aminolysis were investigated The results obtained from this study were as follows; 1. Weight loss, hydrazide end group content, and conversion to amide bond were found to gradually increase in the progress of aminolysis. 2. In aminolyzed PET, the apparent diffusion coefficient of acid dyes increased and apparent activation energies of diffusion decreased in the progress of aminolysis. 3. Chemical stress crack gradually occured on film surface in the progress of aminolysis. 4. Peak temperature of loss tangent tan δ and dynamic loss modulus E" of the film shifted to the lower temperature in the progress of aminolysis, Futhermore tensile modulus E' decreased.