主管：中华人民共和国应急管理部
主办：应急管理部天津消防研究所
ISSN 1009-0029  CN 12-1311/TU
消防科学与技术

消防科学与技术 ›› 2022, Vol. 41 ›› Issue (11): 1537-1541.

• • 上一篇    下一篇

功能化苯基膦酸镧在环氧树脂中的阻燃作用研究

孔庆红，宋晓雨，李未希，汪 源   

  1. （江苏大学 环境与安全工程学院，江苏 镇江 212013）
  • 出版日期:2022-11-15 发布日期:2022-11-15
  • 作者简介:孔庆红（1977- ），女，江苏大学环境与安全工程学院副教授，博士，主要从事清洁高效阻燃纳米复合材料研究，江苏省镇江市学府路301号，212013。

Study on flame retardant effect of functionalized lanthanum phenyl phosphonate in epoxy resin

Kong Qinghong, Song Xiaoyu, Li Weixi, Wang Yuan   

  1. （School of Environmental and Safety Engineering, Jiangsu University, Jiangsu Zhenjiang 212013，China）
  • Online:2022-11-15 Published:2022-11-15

摘要： 为提高环氧树脂（EP）的热性能和阻燃性，以回流法合成了层状苯基膦酸镧（LaPP），并用六氯环三膦腈（HCCP）进行表面接枝改性，得到HCCP-LaPP，将其用于环氧树脂中制备EP/HCCP-LaPP复合材料；研究LaPP和HCCP的协同作用对EP阻燃性能、热性能的影响。结果表明，添加HCCP-LaPP能明显改善EP复合材料在较高温度下的热稳定性和残留量。锥形量热仪测试结果表明，与纯EP相比，EP/6%HCCP-LaPP复合材料的总热释放量和总烟气释放量分别降低了39.9%和24.6%。同时，氧指数值从25.7提高到30.3，垂直燃烧UL-94等级从NR提高到V-1。在700 ℃，EP/6%HCCP-LaPP复合材料的残留量为25.7%，而EP只有18.5%。说明HCCP-LaPP在阻燃EP中具有良好的阻燃作用，LaPP和HCCP优异的成炭作用、片层阻隔作用及磷氮协效使EP复合材料的阻燃性、抑烟性和热稳定性显著提高。

关键词: 环氧树脂, 苯基膦酸镧, 六氯环三磷腈, 阻燃

Abstract: In this study, layered material lanthanum phenylphosphonate (LaPP) was synthesized by reflux method and the surface of LaPP was grafted modified by hexachlorocyclotriphosphonitrile (HCCP) in order to improve the thermal stability and flame retardancy of epoxy resin (EP). As a result, HCCP-LaPP was created and used to the preparation of HCCP-LaPP/EP composites. In addition, the synergistic effect of LaPP and HCCP on the flame-retardancy and thermal stability of EP was studied. The results show that the addition of HCCP-LaPP can significantly improve the thermal stability and residues weight of EP composites at higher temperatures. Conical calorimeter test results show that compared with those of pure EP, the THR and TSP of 6% mass HCCP-LaPP/EP reduced by 39.9% and 24.6%, respectively. Meanwhile, the LOI value was increased from 25.7% to 30.3%, the UL-94 rating was enhanced from NR to V-1 and the residues weight of 6% HCCP-LaPP/EP composites was 25.7% while the pure EP had only 18.5% at 700 ℃. It is proved that HCCP-LaPP has a good synergistic effect in flame retardant EP. Excellent carbonization, lamellar barrier and phosphorus and nitrogen coeffect of LaPP and HCCP make the flame retardancy, smoke suppression and thermal stability of EP composites significantly improved.

Key words: epoxyresins, lanthanum phenylphosphonate, hexachlorocyclotriphosphonitril, flame retardant