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A phosphazene‐triazine bi‐base sulfonate compound (CPNS) was synthesized using hexachlorocyclotriphosphazene, cyanuric chloride, and sodium p‐hydroxybenzene sulfonate as raw materials. The chemical structure was determined by FTIR, 1H NMR 31P NMR (NMR stands for nuclear magnetic resonance), and elemental analysis of P, Na. To study the flame retardant properties of CPNS, a series of modified polycarbonate...
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