选择三聚氰胺(ME)和三聚氰胺氰尿酸盐(MCA)分别与聚磷酸铵(APP)复配制备阻燃环氧树脂试样,并以石墨烯为增强剂对最优阻燃体系进行增强。结果表明:当APP∶ME=3∶1(质量比)时为最佳阻燃体系,极限氧指数达到30.2%,垂直燃烧等级达到UL 94 V-0级,拉伸强度为55.4MPa,冲击强度为8.3kJ/m2。热重结果显示添加阻燃剂虽然降低了环氧树脂的初始分解温度,但随着温度进一步升高,体系具有更好的热稳定性。阻燃环氧树脂材料中加入适量的石墨烯可使其阻燃性能略有提高,而力学性能得到大幅度提升。
The flame retarded epoxy resin samples were prepared by adding APP and selected MC and MCA flame retardants respectively,the graphene as strengthening agent was added to reinforce the optimum flame retardant system.Results showed that the optimum flame retardant system was that the oxygen index was 30.2%,the vertical burning reached UL 94 V-0 level,the tensile strength reached 55.4MPa,the impact strength reached 8.3kJ/m2 when the weight ratio of APP and MC was 3∶1.TG results showed that the initial decomposition temperature of epoxy resin was lower when filling with flame retardant,but the thermal stability was for the better as the temperatures raised further.The flame retardant properties of epoxy resin material was improved slightly and the mechanical properties was improved greatly when filling with the right amount of graphene.
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基金资助
国家自然科学基金(51073095)
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