Flammability and Thermal Characterization of PMMA/ Clay Nanocomposites and Thermal Kinetics Analysis

摘要

A detailed study of thermal stability of Poly (Methyl methacrylate)/layered silicate nanocomposites has been carried out in this work. Commercially modified nanoclays such as cioisite 30B (30B), cloisite 93A (C93A) and Na-MMT and in-house modified Na-MMT were used as nanofilier in this study. All the systems were characterized by X-ray diffraction, thermogravi-metric analysis, differential scanning calorimetry, thermal conductivity. Investigations revealed the improved thermal properties of PMMA nanocomposites and the validity of Ozawa and Kissinger for the PMMA nanocomposites were also confirmed. Detailed study on thermal degradation kinetics using Ozawa and Kissinger model was carried out. The flammability of the materials has been investigated by cone calorimeter experiment, which showed reduced flammability of the nanocomposites. Formation of protective char layers during burning of nanocomposites was also observed through SEM analysis.