聚苯基膦酸二苯芴酯的合成与应用

Synthesis and Application of Poly(bisphenyl fluorene ester phenyl phosphonate)

以双酚芴和苯基膦酰二氯为原料,采用溶液聚合法合成了聚苯基膦酸二苯芴酯(PFPPP)。采用FTIR、1H-NMR和31P-NMR对PFPPP的结构、组成进行了表征,GPC和TGA分别对PFPPP的相对分子量、热稳定性能进行了表征,结果表明:成功合成了聚苯基膦酸二苯芴酯,其数均分子量可达11万,分子量分布为1.26,分布较窄;聚苯基膦酸二苯芴酯的初始分解温度为286℃,分解温度分布较宽,于845℃时PFPPP的成炭率高达45%。此外,对PFPPP在PC、PC/ABS体系的阻燃性能进行了测试,研究发现PFPPP在PC体系中的添加量(ω)为3%、PC/ABS体系中ω为5%时,两者阻燃级别均达到V-0级;当ω为10%时,PC的氧指数由25%提高到31%,可见PFPPP的添加提高了PC、PC/ABS的阻燃性能。

A poly （bisphenyl fluorenyl phenyl ester phosphonate） （PFPPP） had been successfully synthesized from 9,9-bis （4-hydroxyphenyl） fluorene and phenyl phosphorus dichloride by solution polycondensation. The structure and component of PFPPP was characterized by Fourier transform infrared spectroscopy（FTIR） and nuclear magnetic resonance（^1H-NMR and 31P-NMR） , and the molecular weight of PFPPP was characterized by gel permeation chromatography （ GPC ）. Furthermore, the thermal degradation behavior of PFPPP was investigated by thermogravimetric analysis （TGA）. The results showed that the number average molecular weight of PFPPP was up to 110,323, and had a narrow distribution with 1. 26. The initial decomposition temperature of PFPPP was high at 286℃,with a wide range of decomposition,when the test temperature was up to 845℃ ,it had a higher char yield of 45 % . In addition, PFPPP was applied in PC and PC/ABS systems to study its flame retardant property. It was found that the two systems reached V-0 grade for PC with the addition amount of PFPPP 3 % and for PC/ABS with addition amount of PFPPP 5 % ;when the addition amount was 10 % for the two systems, the limiting oxygen index （LOI） of PC was improved from 25 % to 31%. Obviously, the addition of PFPPP improved PC, PC/ABS flame retardant properties.