Fiber-Forming Polyazomethines with Triarylmethane Fragments in the Main Chain and Their Properties

Abstract

Fusible and soluble polyazomethines containing triarylmethane fragments in the main chain were synthesized. IR and NMR spectroscopy established the structures of the obtained polymers. It was shown that polyazomethine fibers could be prepared from their melts. It was found that the obtained fibers were birefringent, indicating that the macromolecules were highly oriented during their spinning. The polyazomethine fibers had increased strength and elasticity modulus. It was found that annealing the polyazomethine fibers strengthened them. The reason for the increased mechanical properties of the fibers was post-polycondensation that was associated with a change of molecular mass of the starting polymer.