摘要
利用垂直燃烧(UL-94)、极限氧指数、热失重分析(TGA)、扫描电镜(SEM)等测试方法从热分解阶段的机理、燃烧表面炭层形貌等方面对三聚氰胺氰尿酸盐(MCA)在乙烯-乙酸乙烯共聚物(EVA)/氢氧化镁(MH)和EVA/氢氧化铝(ATH)体系的协效阻燃机理进行研究。结果表明,在阻燃剂总含量相同的情况下,EVA/MH/MCA体系的UL-94达到V-0级,极限氧指数可达到33.4%,而EVA/ATH/MCA则无法通过UL-94测试;EVA/MH/MCA体系热稳定性更好;EVA/MH/MCA体系形成的炭层结构更加紧密,阻燃性能更好。
In this paper, flame retardant mechanism of melamine cyanurate （MCA） in the ethylene vinyl acetate copolymer （EVA）/magnesium hydroxide （MH） and ethylene vinyl acetate co polymer （EVA）/aluminum hydroxide （ATH） was investigated in aspect of mechanism of thermal de composition and char layer of the burning surface through the measurements of UL-94 testing, limiting oxygen index （LOI）,thermogravimetric analysis （TGA） and scanning electron microscopy （SEM）.The results demonstrated that,when the content of the total flame retardant is the same, EVA/MH/MCA system can achieve the UL-94 V-0 level and the LOI value can reach 33.4% ,while EVA/ATH/MCA system can＇t pass UL -94 V- 0 test. The thermal stability of EVA/MH/MCA system is better than that of EVA/ATH/MCA system. Moreover,the char layer structure of EVA/ MH/MCA system is more compact,which results in better flame retardant properties.
作者
赵建勋
曹玉娟
胡赵磊
方武
唐龙祥
王平华
ZHAO Jianxun;CAO Yujuan;HU Zhaolei;FANG Wu;TANG Longxiang;WANG Pinghua(School of Chemistry and Chemical Engineering, Hefei University of Technology, Hefei 230009, Chin)
出处
《弹性体》
CAS
2018年第3期35-40,共6页
China Elastomerics
基金
国家自然科学基金资助项目(51372059)
关键词
乙烯-乙酸乙烯共聚物
氢氧化镁
氢氧化铝
三聚氰胺氰尿酸盐
阻燃机理
ethylene vinyl acetate copolymer
magnesium hydroxide
aluminum hydroxide
mela mine cyanurate
flame retardant mechanism
