A straightforward, eco-friendly and cost-effective approach towards flame retardant epoxy resins
A straightforward, eco-friendly and cost-effective approach towards flame retardant epoxy resins
复制标题
DOI：
10.1039/c4ta03197k
复制
发表时间：
2014-01-01
影响因子：
11.9
通讯作者：
Romero Sanchez, Maria Dolores
中科院分区：
文献类型：
--
作者：
Carja, Ionela-Daniela;Serbezeanu, Diana;Romero Sanchez, Maria Dolores
用有机磷化合物作为反应性共反应物或添加剂对环氧树脂进行改性，是获得不易燃的先进环氧材料的关键。在本文中，通过直接和具有成本效益的方法，通过简单地将新的磷阻燃剂（13.5重量%磷）与双官能双酚A基环氧聚合物混合，然后在芳族胺硬化剂存在下热固化来制备环氧热固性材料。结果表明，极低含量的磷导致复合材料表现出显著改善的阻燃性。1重量%的磷足以将极限氧指数值提高到约30%。此外，热释放速率的峰值被降低高达45%，这取决于引入到环氧树脂基体中的阻燃添加剂的含量。当将2和3wt%的磷添加到环氧树脂基质中时，获得UL-94 V-0材料。热重数据表明，阻燃添加剂的掺入显着增加的焦炭产率和热稳定性的逐渐形成的富磷碳质层在高温下。
Modification of epoxy resins with organophosphorus compounds, either as reactive co-reactants or additives, is the key to achieving non-flammable advanced epoxy materials. Herein, through a straightforward and cost-effective approach, epoxy thermosets were prepared by simply mixing a new phosphorus flame retardant (13.5 wt% phosphorus) with a bifunctional bisphenol-A based epoxy polymer, followed by thermal curing in the presence of an aromatic aminic hardener. It was proved that a very low content of phosphorus led to composites exhibiting remarkable improved flame retardancy. 1 wt% phosphorus was enough to increase the limiting oxygen index value to about 30%. Furthermore, the peak of the heat release rate was reduced up to 45%, depending on the content of the flame retardant additive introduced into the epoxy matrix. UL-94 V-0 materials were obtained when 2 and 3 wt% phosphorus were added into the epoxy matrix. Thermogravimetric data showed that the incorporation of the flame retardant additive significantly increased the char yield and thermal stability of the gradually forming phosphorus-rich carbonaceous layer at elevated temperatures.