Abstract
Abstract Application of polyfunctional monomers in the course of polycondensation allows to synthesize different types of polymers using different activity of functional groups. It is possible in this case to vary to a large extent the characteristics of the obtained polymers. The presence of functional groups of different activity in one monomer also allows to modify it by introduction of new fragments for subsequent use in polycondensation or polymerization reactions. The abovementioned is confirmed by the example of using trimellitic anhydride and a number of alicyclic tetracarbonic dianhydrides. Trimellitic anhydride is directly used for synthesis of polymers and also modified for preparation of new derivatives. The perspective of using alicyclic tetracarbonic dianhydrides for synthesis of heterocycles has been shown. Varying the monomer nature and conditions of a polycondensation reaction, polymers with different specific characteristics have been obtained: heat‐resistant, high‐ and low‐fusible, soluble, incombustible, film‐forming, fiber‐forming, binding for glass‐plastics.