| Summary: | 碩士 === 國立臺灣大學 === 高分子科學與工程學研究所 === 105 === We developed a series of anti-flame propagation agent (AFPA) comprising of the exfoliated nanoscale silicate platelets (NSP), organic resins and optionally phosphorus compound. The silicate clay nano-hybrids can be applied as surface coating resins into films. The NSP have self-assembling behaviors to form thin films with highly ordered structure that entrapped 40% air in the void. The air voids and its 2D structure provided great potential for flame retardant applications. For practical uses, polymer resins including methylated melamine, hexachlorocyclophosphazene (HCP), and water-borne polyurethane (WPU) were introduced into the coating films for improving its mechanical properties and flame retardancy. Layered structures of NSP composites were analyzed by scanning electron microscopy (SEM) and the flame test under butane torch was performed in a video, for showing the prevention of flame spread x-y and z-axis flame penetration for over 120 seconds. Further works on the AFPA films after combustion were characterized by SEM for their microstructures, by X-ray powder diffraction (XRD) for their crystalline structures and by energy dispersive X-ray spectroscopy (SEM-EDX) for element analysis. A sponge-like network structure was visualized, origin quartz and characteristic structures had transformed into β-cristobalite and amorphous structures after 120 seconds of flaming. The morphologies before and after combustion of the silicate-involved films gave rise to the elucidation of anti-fire mechanism.
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