Abstract
A new polyimide, PI(BTDA/ep-AHHFP) containing epoxy groups was synthesized by the reaction of epichlorohydrin with PI(BTDA/AHHFP) in the presence of benzyl trimethylammonium chloride at 110-120°C. This polyimide having epoxy groups is highly soluble in most common solvents. Photochemical reactivity of epoxy groups in PI(BTDA/ep-AHHFP) was examined by IR spectra in the presence of diphenyliodonium hexafluoroarsenate. The effects of the concentration of photo-acid generator were also studied. The PI(BTDA/ep-AHHFP) containing benzophenone groups reacts more rapidly than PI(6FDA/ep-AHHFP) without benzophenone group, and it reacts considerably in the presence of DPI-AsF6 with photoirradiation and even without the post cure.
