The thermal stability and kinetics of thermal degradation for water soluble polyester (WSP)

which is prepared by the copolycondensation of dimethyl terephthalate (DMT)

dimethyl isophthalate (DMI) and 5 sodium sulfonate isophthalate methyl (SIPM) with ethylene glycol (EG)

were studied using the conventional static and dynamic thermogravimetric techniques in a flowing nitrogen atmosphere. The thermal degradation rate parameter k and apprarent activation energy E were calculated using first order reaction intregal methold and Ozawa method respectively.It was found that the thermal degradation of WSPat 290℃ belongs to first order reaction

its rate parameter of thermal degradation k is 12.84×10-6s-1

and average apparent activation energy Eis 156.8 kJ/mol.