Wholly aromatic polysulfonates containing imide linkages were synthesized from N,N''-bis(hydroxyphenyl) pyromellitic diimides or N,N''-bis(hydroxyphenyl)-3,3'', 4,4''-benzophenonetetracarboxylic diimides and aromatic disulfonyl chlorides. The resulting polymers had inherent viscosities in the range of 0.25-0.35이/g and were soluble in polar solvents such as DMF and DMSO. These poly(imide-sulfonate)s revealed relatively good thermal stability. TGA data showed 10% weight losses at 335-365℃ and residual weights at 500℃ were about 62-72% that were almost correspondent to weight percentages of diimide components in the polymer.

N,N''-bis(hydroxyphenyl)pyromellitic diimides 혹은 N,N''-bis(hydroxyphenyl)-3,3'',-4,4''-benzophenonetetracarboxylic diimides를 aromatic disulfonyl chlorides와 반응하여 imide linkage를 갖는 wholly aromatic polysulfonates를 합성하였다. 얻어진 폴리머의 inherent viscosity는 0.25-0.35d1/g의 값을 가졌으며, DMF나 DMSO와 같은 극성용매에 녹았다. 이들 poly(imide-sulfonate)s는 TGA분석결과 335-365℃에서 10% 중량감소가 일어났으며 비교적 우수한 열안정성을 나타내었다. 또한 500℃에서의 잔여 중량비율은 62-72%로서 폴리머내의 디이미드성분의 중량비율과 거의 일치하였다.