The present study is focused on the synthesis and characterization of flame retardant amine-terminated cyclophosphazene and silane functionalized rice husk ash reinforced benzoxazine blended epoxy composites as a halogen-free flame retardant material (ATCP/FRHA/Bz-Ep). FT-IR spectroscopy, scanning electron microscopy (SEM), X-ray diffraction analysis, contact angle measurements, dielectric constant, DSC, TGA, UL-94, LOI and cone calorimetry were used to characterize the surface morphology as well as the structural, electrical, thermal and flame retardant properties of the resultant ATCP/FRHA/Bz-Ep composite material. The experimental results suggested that ATCP/FRHA/Bz-Ep composites exhibit better flame retardant and dielectric performance compared to that of a neat Bz-Ep material. A plausible mechanism of the fire retardant ATCP/FRHA/Bz-Ep composite material is hypothesized based on the results of cone calorimetric, thermal and electrical analysis. From the abovementioned results, it was concluded that the ATCP/FRHA/Bz-Ep composite can be used as an electrical resistant material for electronic and microelectronic applications.

Cyclophosphazene is incorporated in to Bz–Bmi composites in order to improve the thermal, mechanical, electrical resistance and antibacterial properties of CP–Bz–Bmi composite.

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The organic-inorganic hybrid of hexa(aminophenyl)cyclotriphosphazene (CPA) was synthesized by reacting hexachlorocyclotriphosphazene with 4-acetamidophenol followed by hydrolysis. The resulting product CPA was then allowed to react with 2,2-bis(4-cyanatophenyl)propane (cyanate ester) in different ratios (5, 10, and 15%) to form six-membered oxygen-linked triazine ring with formation of highly cross-linked network structure. Thermal curing behavior was confirmed using Fourier transform infrared spectroscopy analysis and thermal properties were studied using thermogravimetric analysis and differential scanning calorimetry analyses. Dielectric constant and dielectric loss were measured using impedance analyzer. Data resulted from different studies indicate that these hybrid composites can be used for high-performance thermal applications in the place of conventional cyanate esters for better performance.

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