Healable and recyclable polyimide polymer resin, healing method and recycling method thereof

A healable and recyclable polyimide polymer resin, comprising a chemical structural unit represented by formula (I):

• wherein in the formula (I), A is single bond, benzene, biphenyl, benzophenone or 3,3′-bis(trifluoromethyl)-4,4′-dimethylbiphenyl, each of R1 and R2 is methyl, ethyl or trifluoromethyl independently, X1 is diphenyl ether, biphenyl, benzophenone, 2,2-diphenyl propane, (−)-di-p-toluenesulfonyl, or 3,3′-bis(trifluoromethyl)-4,4′-dimethylbiphenyl, X2 is a group represented by formula (IA):
• wherein in the formula (IA), Q is benzene, hexafluoro-2,2-diphenylmethane, biphenyl, benzophenone, diphenyl ether or alicyclic structure, each of P1 and P2 is benzene, biphenyl, hexafluoro-2,2-diphenylmethane or alicyclic structure independently, and P1 and P2 are connected to or disconnected from each other;
• wherein the chemical structural unit represented by the formula (I) bonds to at least one condensation-polymerizable monomer, so as to form the healable and recyclable polyimide polymer resin, and the condensation-polymerizable monomer is a diamine monomer or a dianhydride monomer.