Abstract
The fibers containing primary amino groups were prepared by reacting PAN fiber with ethylene diamine (EDA). This aminated PAN fibers was finally modified with cellulose acetate (CA) in the presence of hexamethylene diisocyanate (HDI) as binder The amine content of PAN fibers was 0.012∼0.327 meq/g, and the maximum amice content of PAN fibers was obtained after 18 hrs of amination. The finally modified PAN fibers contained less than leyc of CA. The storage modulus of final PAN fiber in glassy state was decreased, but increased in rubbery state after modification. As EDA and CA was introduced Into PAN fibers, Tg's were slightly shifted to lower temperature. In the SEM micrographs the surface of aminated PAN fibers became coarse, but the surface of the final PAN fibers containing CA did smoother than that of original fiber. The modification enhanced the Young's modulus of PAN fiber. While the aminated PAN fiber showed stress-hardening behavior at large deformation, the final PAN fiber modified with CA did low yield behavior as well as thermoplastic deformation.