Thermal stabilities of copolymers of styrene and methacrylic acid and their salts

The thermal stabilities of copolymers of styrene and methacrylic acid and their sodium salts have been studied. The values of the thermal stability IDT,T_s and the kinetic parametersn, E, S andZ have been determined and the results are discussed. It has been found that the thermal stabilities of the investigated copolymers of styrene and methacrylic acid and their sodium salts are practically independent of the amount of methacrylic acid or sodium methacrylate introduced.