阻燃剂2–丙酸钠苯基次膦酸钠的制备及其在PET中的应用

Preparation of Flame Retardant 2-Sodium Propionate Phenyl Sodium Hypophosphite and Its Application In PET

以磷系阻燃剂2–羧乙基苯基次膦酸(CEPP)和氢氧化钠(NaOH)为原料,合成2–丙酸钠苯基次膦酸钠(CEPP–Na),并与聚对苯二甲酸乙二酯(PET)共混制得阻燃聚酯。通过傅立叶变换红外光谱和能谱表征了产物结构,采用极限氧指数(LOI)测试、热重分析、扫描电子显微镜观察等方法对产物的燃烧性能、热性能、相容性、成炭形貌等进行研究。结果表明,合成的CEPP–Na与PET基体相容性良好,且避免了直接使用CEPP带来的降解问题。当CEPP–Na的质量分数为15%时,阻燃聚酯的LOI为28.5%,且UL–94达到V–0级。

A novel flame retardant 2-sodium propionate phenyl sodium hypophosphite（CEPP-Na） was synthesized by phosphorus-containing flame retardant 2-carboxyethyl （phenyl phosphinic）acid（CEPP） and sodium hydroxide （NaOH）. It was used as the flame retardant for poly （ethylene terephthalate）（PET）.The structure of CEPP Na was confirmed by FT-IR and EDS.The flame retardance, thermal behavior, compatibility and the morphology of char layer for PET / CEPP--Na system were investigated by limited oxygen index（LOI）, UL-94 test, thermo gravimetric analysis and scanning electron microscope （SEM） observation.The results show that the prepared CEPP-Na has well compatibility with PET matrix, and eliminates the degradation of PET during blending.When the dosage of CEPP-Na is 15%, the LOI of modified PET can be increased to 28.5%.The material can address the grade of UL-94 V-0.