Abstract
The method for preparing monodisperse spherical polyimide particles by heating polyamic acid in aprotic polar solvents was examined. The copolymer consisting of a soluble polyimide and an insoluble polyimide were found to form the monodisperse spherical polyimide particles by heating it for imidization. This may be due to the dispersion effect, in which the soluble polyimide chains form a stable layer on the particle surface in the process of polyimide particle formation. However, monodisperse spherical particles were not obtained by the copolymerization of the polyimide that formed formless particles with the soluble polyimide. Moreover, monodisperse spherical particles with amino groups were also prepared by this method. The amino groups introduced on the particles were allowed to react with an acid chloride.
