Abstract
The current study focuses on overcoming the fire threat posed by styrenic polymer, widely used as electronic enclosures. Our detailed investigation majorly aimed at analyzing the influence of fire on the shear resistivity characteristics of polystyrene reinforced with Cloisite 20A. The increased viscosity in the case of nanocomposites owing to the restricted mobility of polymer chains and the tortuous path created by C20A prevented the escape of volatile by-products of polymer combustion, thereby substantially reducing the heat release rate. The improved moduli of nanocomposites further restricted the movement of combustion products to the flaming zone and reduced the mass loss rate too. X-ray diffraction spectra and transmission electron micrographs disclosed exfoliation of the nanoclays corroborating the improved fire, shear and thermal behavior.
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