Patent ID: 8791227

Claim:
A crosslinked aromatic polyimide having shape memory properties, the crosslinked aromatic polyimide comprising: at least one aromatic diamine; at least one dianhydride monomer; and a tri(oxybenzene-amine) crosslinker having the general formula: wherein W is selected from a group consisting of N, P═O, or BO 3 ; R is selected from a group consisting of H, F, Cl, CF 3 , or CH 3 ; and the amine groups are located meta or para with respect to R, the crosslinked aromatic polyimide having the general formula: wherein Y is selected from the group consisting of —C(CF 3 ) 2 —, —O—, —SO 2 —, >C═O—, -(Ph)C(CF 3 )—, —OPh-C(CH 3 ) 2 -PhO—, —O(1,3-Ph)O— and —O(1,4-Ph)O—; and n, m, and 1 are degrees of polymerization of each branch of the crosslinked aromatic polyimide.