STUDY OF THE PYROLYSIS PROCESS OF PLASTIC WASTE BY DERIVATOGRAPHIC ANALYSIS METHOD

Abstract

The dependance of temperature and time on mass loss, mass loss rate and intensity of endothermic peaks during the pyrolysis process of polyethylene terephthalate (PET-1) polymer at various heating rate (10, 50 0C/min) was studied by derivatography methods. The parameters, as temperature (T) and time (t) of the beginning of destruction, temperature (T) and time (t) of half destruction, mass destruction time (min) at 5100C and energy activation of the destruction process were estimated. Furthermore, the melting parameters as ∆H, square peak (mJ) and mass loss rate (∆mdt) are calculated. The obtained results show that as the heating rate increases, the destruction process occurs at higher temperatures, the initiation time of the destruction process decreases, and the activation energy of the decomposition is approximately equal to 58-60 kcal/mol. Two stages of exothermic nature were observed. The first occurs in the temperature range from 377,0 °C to 410.4°C, and the other in the range of 430.0°C to 475.7°C.