EFFECT OF TETRAPHENYL PHOSPHONIUM MODIFIED MONTMORILLONITE ON THE NON-ISOTHERMAL CRYSTALLIZATION ...

XRD patterns and TEM images were used to characterise poly (ethylene terephthalate) (PET) nanocomposites with varied loadings of montmorillonite and tetraphenyl phosphonium bromide (TPP-MMT) as a modifier. The goal of this research is to look into the influence of TPP-MMT addition on PET non-isothermal crystallisation and thermal degradation behaviour. The production of intercalated nanocomposite structures was proposed by X-Ray Diffraction (XRD) patterns and Transmission Electron Microscope (TEM) analyses. TPP-MMT nucleating impact, on the other hand, was investigated using differential scanning calorimetric (DSC) analysis, which revealed that TPP-MMT acted as a nucleating agent and increased the PET crystallisation rate. The nonisothermal crystallisation behaviour and kinetics of PET/ TPP-MMT were further examined using DSC data and the Avrami and Liu models. It was demonstrated that the nanocomposites improved their thermal stability. The activation energies E of thermal degradation for nanocomposites were found to be greater than those of virgin PET, showing that TPP-MMT had a stabilising impact on matrix disintegration. The TGA kinetic analysis demonstrated that the thermal degradation process of pristine PET and its two nanocomposites at 2 and 4 percent wt follows the Phase boundary reaction, with n = 2 model, but the kinetic model for PET 6 percent TPP-MMT nanocompossite is Phase boundary reaction, with n = 3. Because this characterization investigation is supported by multiple models, the results are scientifically sound.

Please see the link :- https://www.ikprress.org/index.php/JACSI/article/view/3297