A novel polysiloxane (APID) containing phosphorus, nitrogen and benzene rings was synthesized as a flame retardant, which is hydrophobic and thermally stable in air (residual weight being 46.1 wt.% at 800 °C). APID is synergistic with ammonium polyphosphate (APP) in the formation of strong cross-linked intumescent char layer, resulting in improved flame retardancy, smoke suppression and dripping resistance of polypropylene (PP). With 23 wt.% of APP and APID (3:2), the flame retarded PP achieved V-0 rating at UL-94 test and its peak heat release rate was reduced by 75.7% in the cone calorimeter test. Moreover, APID improved the compatibility of APP with PP matrix to minimize the negative effect of APP on the mechanical properties of PP. The detailed flame retardant mechanism was discussed in the text.

合成了一种新型的含磷，氮和苯环的聚硅氧烷（APID）作为阻燃剂，它在空气中具有疏水性和热稳定性（在800°C下的残留重量为46.1 wt。％）。APID与聚磷酸铵（APP）协同形成牢固的交联膨胀型炭层，从而提高了聚丙烯（PP）的阻燃性，抑烟性和抗滴落性。使用23％（重量）的APP和APID（3：2），阻燃PP在UL-94测试中达到V-0等级，并且在锥形量热仪测试中其峰值放热率降低了75.7％。此外，APID改善了APP与PP基质的相容性，以最大程度地降低APP对PP力学性能的负面影响。在文中讨论了详细的阻燃机理。