The soluble photosensitive polyimides were synthesized by the copolymerization of 3,3′-diaminochalcone (mDAC),bis(3-aminophenyl)-3,5-bis(trifluoromethyl)phenyl phosphine oxide (mDA6FPPO) and 4,4′-(hexafluoroisopropylidene)-diphthalic anhydride (6FDA).The polymers were characterized by FT-IR spectrum, and the properties of polymers were also discussed.The results show that the polyimides have excellent solubility in conventional organic solvents such as NMP,DMF,THF and acetone.The T_ gs of polyimides are ranged in 256℃～277℃.The polymers are stable up to over 400℃ and the residual weights at 800℃ are between 46%～50%.The resulting polyimides have good adhesive properties,and they were found to increase with increasing the mDA6FPPO content.The photosensitivity of the polymers was investigated by observations of UV-Vis spectral changes during UV irradiation.
