Dependence of the conformational characteristics of polyphenylquinoxalines on the chemical structure of the chain

Abstract The conformational characteristics of polyphenylquinoxalines have been calculated by the Monte-Carlo method, assuming free rotation about the virtual bonds. An analysis was made of the effect of the chemical structure of the repeating unit on the length of the statistical segment A fr . It is shown, with poly-2,2′-(1,4-phenylene)-7,7′-oxy-bis-(3-phenylquinoxaline) as an example, that A fr and the experimental length of the statistical segment, found from sedimentation and viscosity measurements on solutions of fractions are in good agreement.