The flame retarding mechanism of polyazodiphenylene phenylphosphonate (PAPPP) to PET was investigated by thermogravimetry (TGA) and pyrolysis gas chromatography-mass spectroscopy (PGC-MS).

• 与纯PET相比,共混物的热解温度范围变宽,残余量增加,且在PET燃点附近的可燃性挥发气体的生成量降低,表现为凝聚相阻燃机理。