ELECTRICAL AND DIELECTRIC-PROPERTIES OF POLYMERIZING MIXED SINGLE-CRYSTALS OF DIACETYLENES - PTS-PFBS SYSTEM

The paper presents results of measurements of evolution of the photoco nductivItY and the low-frequency electric permittivity of the mixed pT S-pFBS diacetylene single crystals during the thermally driven solid-s tate polymerization. The kinetics of the polymerization was found to b e a function of the composition of the crystals, the rate constants in the induction and autocatalytic periods following different compositi on dependences. Changes in the kinetics of the photocurrent build-up e ssentially follow the changes in the polymerization kinetics. Temperat ures of the phase transitions in the mixed crystals decrease with incr easing concentration of pFBS, probably due to weaker dipole-dipole int eractions between fluorobenzenesulfonyl side groups.