【摘要】 用热重分析(TGA)和热裂解色谱(PGCMS)研究了阻燃剂聚苯基膦酸二苯偶氮酯(PAPPP)对聚对苯二甲酸乙二醇酯(PET)的阻燃作用机理。TGA结果表明PAPPP/PET(15/85)共混物的起始分解温度为337℃,550℃的热解残余量为26.800,450℃～550℃的失重为23.300,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.PGCMS分析表明,加入PAPPP对PET的热裂解模式有一定影响,在燃烧过程中伴有酯交换反应。更多还原

【Abstract】 The flame retarding mechanism of polyazodiphenylene phenylphosphonate （PAPPP） to PET was investigated by thermogravimetry （TGA） and pyrolysis gas chromatography-mass spectroscopy （PGC-MS）. The TGA dates showed that the initial decomposition temperature of PAPPP/PET （15/85） was 337 ℃, the char residue at 550 ℃ was 26.80₀, and weight loss from 450 ℃ to 550 ℃ was 23.30₀. Compared with pure PET, the range of decomposition temperature of was wider, the char residue was higher, and the mount of combustible volatile gas was less. These results indicated that the flame retardancy of PAPPP was solid-phase mechanism. The PGC-MS analysis indicated that PAPPP affected the pyrolysis of PET. Transesterification was carried during the combustion of PAPPP/PET blending.更多还原