Durable Flame-Retardant Cotton Fabric Modified by a Novel Reactive P-N Intumescent Flame Retardant

A novel reactive P-N intumescent flame retardant tetroxo (3-triethylphosphine-5-chlorine-1-triazine) neopentane (TTCTN) was prepared, and its structure determined by Fourier transform infrared (FTIR) nuclear magnetic resonance (NMR). The retardance physiological comfort properties of TTCTN-treated cotton fabrics (TTCTN-CF) researched. CF treated with 20 wt% TTCTN (TTCTN(20)-CF) showed the limiting oxygen index (LOI) up to 28.6%, retardancy reached class B1 national standard fabrics, peak heat release rate total were reduced 55.7% 37.4% comparing untreated CF, respectively. FTIR proved grafted on matrix. Thermogravimetric (TG) could reduce decomposition speed fabric formed stable char residue at high temperature protect remaining from complete dehydration. After 50 washing cycles, LOI TTCTN(20)-CF 26.2%, still reaching fabrics. Scanning electron microscope bounded matrix after cycles which further had excellent durable retardancy.