수화용융체를 이용한 아크릴섬유의 제조와 특성에 관한 연구(I)？폴리아크릴로니트릴 수화용융체의 등온결정화 거동？

Abstract

state were studied. As water was added, the melting point of PAN was depressed sharply to reach a plateau region in which allthe nitrile groups of the polymer were hydrated. The crystallization exotherms of PAN/water mixture showed complex pro-files. On DSC analysis, it was found that the exotherm from the crystallization (dehydration) heat of the hydrated PAN wasoverlapped with the latent heats by the neat PAN and water which was not evolved during quenching. Thus, in order to inves-tigate the dehydration kinetics of PAN/water mixture, it was required to separate the exothermic peak by the isothermal crys-tallization from the peaks by the evolution of latent heats of the each component, i.e., PAN and water. By subtraction of thecrystallization peak of PAN/water mixture was successfully obtained according to various crystallization temperature (Tc).