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.
In this research, physical and mechanical properties of the semi-crystalline polymerpoly-(3-hexylthiophene-2,5-diyl)-based blends were investigated. The volume versus the temperature curves of polymerpoly-(3-hexylthiophene-2,5-diyl)/methano-fullerene derivative[6,6]-phenyl-C64-butyricacidmethyl ester (P3HT:PCBM), polymerpoly-(3-hexylthiophene-2,5-diyl)/DOCN-PPV (P3HT/CNPh-PPV) were ploted; however, we obtained one single temperature for each curve between Tgs of compounds and this could be considered as a good indicator of miscibility. In addition, The CED (Coesif energy density) of P3HT, PCBM and CNPh-PPV were calculated and used to obtain the solubility parameters δ_P3HT, δ_PCBM and δCNPh-PPV. The interaction parameter χ was calculated and used in investigation and we confirmed the miscibility of our polymer systems. By using DPD method, The morphologies of P3HT/PCBM and P3HT/CNPh-PPV were enhanced.
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