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Thermal Stability of Poly(Methyl Methacrylate-co-Butyl Acrylate) and Poly(Styrene-co-Butyl Acrylate) Polymers

The systems of poly(methyl methacrylate-co-butyl acrylate) and poly(styrene-co-butyl acrylate) modified with a small amount of acrylic acid and/or N-methylolacrylamide as crosslinking agent were studied in this work. Programmed thermogravimetric analysis have been used to study the effect of copolymer composition on thermal stability, over a temperature range from 50 to 450^oC, under a constant flow of nitrogen. The kinetic parameters of thermal degradation, the activation energy, pre-exponential factor and reaction order were obtained by using MacCallum-Tanner"s approach. The increase of E_a may be an indication of thermal stability changes in the copolymer systems. The results indicated that the thermal degradation of the investigated copolymer systems are the first order reaction.

Poly(methyl methacrylate-co-butyl acrylate); crosslinking; thermal stability; kinetic parameters; thermal degradation

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