Nv. Platonova et Ib. Klimenko, PECULIARITIES OF THE INTERACTION OF POLYACRYLONITRILE WITH BASIC SOLVENTS DURING HEAT-TREATMENT, Russian journal of applied chemistry, 66(3), 1993, pp. 546-551
An approach is proposed to understanding the nature of chromaticity of
polyacrylonitrile (PAN) solutions thermally treated at 140-degrees-C
in dimethylformamide (DMFA) (and films), which is based on the idea of
complexes forming between molecules of the basic solvent and the poly
mer functional groups modified by the solvent. Manifestation of these
structures is registered in electronic spectra as absorption bands wit
hin the visible wave band. Stated are the general results of the the e
ffect of some basic reactants on the change in PAN structure, includin
g heat treatment.