生物基成炭剂改性聚磷酸铵阻燃剂用于环氧树脂的防火安全性研究

Study of Bio-Based Charcoal-Forming Agent Modified Ammonium Polyphosphate Flame Retardant for Enhancing the Fire Safety Performance of Epoxy Resin

合成了一种生物质基成炭剂,并将其应用于聚磷酸铵(APP)阻燃剂的改性,以提高环氧树脂(EP)的防火安全性能。将三聚氰胺(MA)与香草醛进行反应生成成炭包覆体(MV)后,对APP进行包覆以得到生物基成炭剂改性的APP阻燃剂(MV@APP),并将其应用于EP的防火中。通过测试得出,在相同的阻燃剂添加比例下(5%),MA与香草醛以质量比1∶2进行反应后,对APP进行包覆所得出来的阻燃剂应用于EP(MV@APP/EP-2)的效果最佳。锥形量热仪测试得到,峰值热释放速率、总热释放量、总产烟量分别下降了57.2%、62.7%和66.4%。热稳定性分析可知,MV@APP的加入提升了热稳定性以及残炭量。除此之外,由于有机成炭剂对APP的改性,改善了阻燃剂与EP间的相容性,阻燃剂的添加使EP的弯曲性能得到增强。

A biomass-based charring agent was synthesized and applied to the modification of ammonium polyphosphate(APP)flame retardant to enhance the fire safety performance of epoxy resin(EP).After the reaction of melamine(MA)and vanillin in different ratios to form a carbonized coating(MV),APP was coated to obtain the bio-based charcoalforming agent modified APP flame retardant(MV@APP),which was added to EP.It was found that the flame retardant obtained from the 1∶2 mass ratio of MA to vanillin in the same flame retardant additive ratio(5%)was the most effective in EP(MV@APP/EP-2),with the peak heat release rate,total heat release and total smoke production reduced by 57.2%,66.4%and 62.7%,respectively.Thermal stability analysis shows that the addition of MV@APP improves the thermal stability as well as the amount of residual carbon.In addition,the compatibility between the flame retardant and EP was improved by the modification of APP by the organic charcoal-forming agent,and the flexural properties of EP were enhanced by the addition of the flame retardant.