Four relaxation processes identified in polystyrene containing 2 wt % of DR1 chromophore were studied by the dielectric spectroscopy in the frequency range from 1 Hz to 1 MHz at constant temperatures from 30 to 130 <$E symbol Р>C and by thermally stimulated depolarization current measurements at sub-zero temperatures down to -160 <$E symbol Р>C. Hamon's transformation of isothermal depolarization currents were also performed to give information on dielectric relaxation at infra-low frequencies. It has been found that distribution of relaxation times related to <$E alpha> relaxation becomes wider due to presence of dye molecules, while both the dielectric constant and the dielectric strength increase. Considerable narrowing of the loss peak was observed with increase of temperature indicating that the PS/DR1 system is not the thermoreologically simple one and temperature-time superposition principle is not applicable above glass transition where the temperature dependence of the relaxation time obeys Williams - Landel - Ferry law. It has been found that Arrenius law is valid below glass transition.

• Федосов Сергій Никифорович (фізико-математичні науки)
• Сергєєва Олександра Євгенівна (фізико-математичні науки)

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