Thermal degradation of polysulfones X: the thermal degradation of poly(olefin sulfone)s

Abstract

The thermal degradation of poly(1-butene sulfone) (PBS) and poly(2-methyl 1-pentene sulfone) (PMPS) was studied under a nitrogen atmosphere using a thermogravimetric analyzer. The activation energies of thermal decomposition were evaluated using Flynn–Wall and Freeman models. The experimental results showed that the activation energy of isothermal heating of PBS was 76.2 kJ/mol over the range 180–240 °C, and for PMPS was 117 kJ/mol over 145–170 °C. The activation energies of dynamic heating of PBS and PMPS were 108 and 101 kJ/mol, respectively, at various heating rates, 5, 10, 20 and 40 °C/min.