Explanation

The main chain of macromolecule contains heterocycles or aromatic heterocycles. The ring forming atoms of polymer include oxygen, nitrogen, sulfur, phosphorus and other atoms in addition to carbon atoms, which are usually five membered heterocycles or six membered heterocycles. heterocyclic polymer is usually obtained by polymerization of monomer containing heterocyclic structure or by closed-loop reaction during stepwise (reaction) polymerization. Heterocyclic polymers, such as polyimide, polybenzimidazole, polyphenylene triazine, etc., have excellent heat resistance and are usually used as high temperature resistant macromolecule materials.

Classification