Preparation, morphology, and thermomechanical properties of coal ash/polyethylene oxide composites

Authors : Khalid SAEED, Muhammad ISHAQ, Muhammad ILYAS

Pages : 237-243

Doi:10.3906/vet-1110-24

View : 17 | Download : 11

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :Coal ash/polyethylene oxide insert ignore into journalissuearticles values(ash/PEO); composite films were prepared by the solution casting technique. Scanning electron microscopy insert ignore into journalissuearticles values(SEM); micrographs indicated that the ash particles were dispersed and embedded well within the polymer matrix. The size of the ash particles in the PEO matrix was less than 3 m m. The polarized optical microscopic insert ignore into journalissuearticles values(POM); analyses revealed that the pure PEO, upon crystallization, showed distinct crystalline spherulites of a considerable size. The size of the spherulites was decreased by the incorporation of ash particles into the polymer matrix, which might be due to the nucleation role of ash in ash/PEO composite, and resulted in small-sized spherulites. The differential scanning calorimetry insert ignore into journalissuearticles values(DSC); thermograms showed that the melting temperature insert ignore into journalissuearticles values(Tm); of pure PEO was about 66 °C, while the Tm peak shifted to a slightly lower temperature when ash was incorporated in the polymer matrix. The mechanical properties of the ash/PEO composites were enhanced up to an optimum level insert ignore into journalissuearticles values(ash wt. %); as compared to pure PEO. The thermograms from the thermogravimetric analyzer insert ignore into journalissuearticles values(TGA); indicated that the thermal stability of the ash/PEO composite shifted to a higher temperature, about 30 °C higher than pure PEO.
Keywords : Coal ash, polyethylene oxide, spherulites, SEM, TGA