中国塑料 ›› 2022, Vol. 36 ›› Issue (9): 38-45.DOI: 10.19491/j.issn.1001-9278.2022.09.006

• 材料与性能 • 上一篇    下一篇

DIDOPO与POSS/EG协同阻燃环氧树脂泡沫及机理研究

杨金1(), 陈鹏然2, 高培鑫2   

  1. 1.湖南工业大学城市与环境学院,湖南 株洲 412000
    2.华南理工大学材料科学与工程学院,广州 510000
  • 收稿日期:2022-05-18 出版日期:2022-09-26 发布日期:2022-09-26
  • 作者简介:杨金(1982—),男,博士,高级工程师,从事聚合物复合材料的创新设计、成型和应用领域研究,470325362@qq.com

Preparation and flame-retardant mechanism of epoxy foams synergistically modified with DIDOPO and POSS/EG

YANG Jin1(), CHEN Pengran2, GAO Peixin2   

  1. 1.School of City and Environment,Hunan University of Technology,Zhuzhou 412000,China
    2.School of Materials Science and Engineering,South China University of Technology,Guangzhou 510000,China
  • Received:2022-05-18 Online:2022-09-26 Published:2022-09-26

摘要:

以对苯乙基桥链9,10⁃二氢⁃9⁃氧杂⁃10⁃磷杂菲⁃10⁃氧化物(DIDOPO)、聚甲基倍半硅氧烷(POSS)、膨胀石墨 (EG)为复配阻燃剂对环氧树脂(EP)泡沫进行阻燃改性,研究了复配阻燃剂对EP泡沫材料的阻燃效果和阻燃机理。结果表明,当DIDOPO/POSS=3∶1(质量比,下同)、DIDOPO/EG=1∶3时,复配阻燃体系的阻燃效果最佳;添加20 %(质量分数,下同) DIDOPO/POSS复配阻燃剂的加入可以使EP泡沫的UL 94测试达到V⁃0级; 添加20 %的 DIDOPO/EG复配体系可以使EP泡沫的极限氧指数(LOI)提高至30.8 %,UL 94测试达到V⁃0级;阻燃体系具有一定的抑烟效果。

关键词: 环氧树脂, 泡沫, 阻燃, 协同作用, 阻燃机理

Abstract:

For the epoxy foams prepared using a room⁃temperature foaming method with hydrogen as an air source, the carbon layer formed on the surface of the foams is more easily damaged during the combustion process. The damaged carbon layer cannot effectively isolate heat and oxygen, leading to poor fire resistance. Flame⁃retardant In this work, a type of flame⁃retardant epoxy foams was prepared using p⁃phenethyl bridge⁃chain 9,10⁃dihydro⁃9⁃oxa⁃10⁃phosphaphenanthrene⁃10⁃oxide (DIDOPO), polymethylsilsesquioxane (POSS), and expandable graphite (EG) as flame retardants. When the mass ratios of DIDOPO to POSS and DIDOPO to EG were set to 3∶1 and 1∶3, respecitively, the epoxy foams obtained an optimal flame⁃retardant effect. With the addition of 20 wt% DIDOPO/POSS composite flame retardants, the epoxy foams achieved a UL 94 V⁃0 classification in the vertical burning test. The addition of 20 wt% DIDOPO/EG composite flame retardants enabled the epoxy foams to obtain a limiting oxygen index of 30.8 vol% together with a UL 94 V⁃0 classification for their flame⁃retardant level. This foaming system also exhibited a certain smoke suppression effect.

Key words: epoxy resin, foam, flame retardant, synergy, flame retardant mechanism

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