中国塑料 ›› 2017, Vol. 31 ›› Issue (9): 68-72.DOI: 10.19491/j.issn.1001-9278.2017.09.010

• 材料与性能 • 上一篇    下一篇

氢氧化铝/氢氧化镁复配提高乙烯醋酸乙烯共聚物阻燃性能

陈镜融,谷晓昱,孙军,张胜   

  1. 北京化工大学
  • 收稿日期:2017-05-05 修回日期:2017-05-03 出版日期:2017-09-26 发布日期:2017-10-25

Improvement of Flame Retardancy of Ethylene-vinyl Acetate Copolymer with Al(OH)3 and Mg(OH)2

  • Received:2017-05-05 Revised:2017-05-03 Online:2017-09-26 Published:2017-10-25

摘要: 研究了不同质量比的氢氧化铝(ATH)和氢氧化镁(MH)对乙烯醋酸乙烯共聚物(EVA)燃烧性能的影响,通过极限氧指数测试、垂直燃烧测试、热失重分析和锥形量热测试研究了EVA/ATH/MH复合材料的阻燃性能和热稳定性。结果表明,固定ATH和MH的添加量为60 %(质量分数,下同),ATH/MH=2/1(质量比,下同)时,EVA/ATH/MH复合材料的阻燃性能最好,极限氧指数从18.3 %提高到34.3 %,达到UL 94 V-2级别,热释放速率和热释放总量均有明显下降。

Abstract: Effect of different mass ratios of aluminum hydroxide (ATH) and magnesium hydroxide (MH) on combustion characteristics of ethylenevinyl acetate copolymer (EVA)-based composites was investigated by limiting oxygen index (LOI), vertical burning test, thermogravimetric analysis, and cone calorimeter.The results demonstrated that the composites achieved the optimum flame retardancy with addition of ATH/MH mixture at the mass ratio of 2∶1, and their LOI values increased from 183 vol % to 344 vol %.Meanwhile, flame retardancy of the composites achieved a V-2 classification in UL-94 vertical burning test The cone experiments indicated that heat release rate and total heat release rate of the composites were reduced significantly