A decay of free radicals in y-irradiated rigid main chain thermotropic polymer BRY 856 was studied. The dependence of the rate constant for free radical decay over the pressure region between 1 M Pa and 800 M Pa was determined in the temperature range between 80°C and 230°C. Activation volumes of free radical decay were established. A decrease in activation volume at temperatures above the glass transition temperature of the polymer was observed and attributed to rotational structural order along the long axis of the macromolecules.
Посилання на статтю:
Pressure dependence of free radical decay in y-irradiated main chain liquid crystalline polymers / F. Szocs and M. Klimovb // Polymer. – 1992. – Vol 33. – P. 881-882.