Abstract
The pyrolysis method of both raw and recycled polyethylene terephthalate was studied using the nonisothermal thermogravimetric analysis (TGA) at different five heating rates (10, 15, 20, 25, and 30 K/min) for each element. Without using any mathematical equations, the kinetic parameters of polyethylene terephthalate pyrolysis were obtained by applying the modified distributed activation energy model (DAEM). Furthermore, the glass transition temperature (Tg) of polyethylene terephthalate was simulated using the computer simulation with different methods. The effect of energy in the Tg process was enhanced. The mechanical properties of polyethylene terephthalate were computed. Our simulated values were compared with available data in literature.
Highlights
Decomposition of polymers is an important process [1]
We can remark that the activation energy (Ea) found for the raw Polyethylene terephthalate (PET) is in the range of 120– 150 kJ/mol, and the frequency factor (k0) was in the range of 107–109 s-1, which is in accordance with the results obtained in other studies [23, 24]
Thermogravimetric curves were used to study the pyrolysis process of raw PET and recycled PET by using distributed activation energy model (DAEM) simplified by Miura and Maki
Summary
Decomposition of polymers is an important process [1]. The study of the pyrolysis process of polymers by using nonisothermal thermogravimetric analysis (TGA) was widely known in the last years [2,3,4]. Pyrolysis procedure has more strong points: (i) requires the lowest temperature, (ii) without the need of oxygen, and (iii) fabrication of outstanding quality oil [5]. A good knowledge of the pyrolysis process will be useful and helpful element to the design and operation of pyrolysis reactors with developed efficiency [6]. To find the kinetic parameters of pyrolysis process, different models have been found [7]. We can mention the distributed activation energy model (DAEM) that is used in this paper
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