Effect of Ammonium Polyphosphate Modified with 3-(Methylacryloxyl) Propyltrimethoxy Silane on the Flammability and Thermal Degradation of Pine-Needles

Abstract

This paper investigated the influence of ammonium polyphosphate (APP) and ammonium polyphosphate modified with 3-(methylacryloxyl) propyltrimethoxy silane (M-APP) on flame retardancy and thermal degradation of pine needles. The presence of M-APP increased the char residue and decreased the pyrolysis temperature of pine needles observed by TGA. The addition of M-APP shifted the degradation peaks of pine needles to lower temperatures observed by DTG. The cone calorimetry test results showed that the situation of HRR, THR, SPR, TSP and the mass loss (%) on pine needles treated with M-APP was sharply less than the other samples. On the other hand, M-APP prolonged the ignition time (TTI) compared with the other samples. Therefore, M-APP has an overall better performance than APP on pine needles.