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采用双邻苯二甲腈树脂(BAPh)对环氧树脂E-44(EP)进行改性,同时制备了BAPh/EP/玻纤复合材料。采用示差扫描量热仪,热重分析,力学性能测试及氧指数仪研究了改性树脂的热性能、力学性能及阻燃性能,并对BAPh/EP/玻纤复合材料的力学性能进行了表征。结果表明,当BAPh质量分数达到50%时,改性树脂固化物在空气中的起始分解温度达到377.6℃,比纯环氧提高74.3℃,氧指数达到34.5%,复合材料的弯曲性能指标达到最大,添加双邻苯二甲腈后环氧树脂的耐热性、力学性能和阻燃性能得到了明显改善。
Epoxy resin E-44 (EP) was modified by BAPh resin and BAPh / EP / glass fiber composite was prepared. The thermal properties, mechanical properties and flame retardancy of the modified resin were investigated by differential scanning calorimeter, thermogravimetric analysis, mechanical properties test and oxygen index. The mechanical properties of the BAPh / EP / GF composites were also characterized . The results showed that the initial decomposition temperature of cured resin in air reaches 377.6 ℃ when the mass fraction of BAPh reaches 50%, which is 74.3 ℃ higher than that of pure epoxy and the oxygen index reaches 34.5%. The flexural property index of the composites reaches The maximum, after adding di-phthalonitrile epoxy resin heat resistance, mechanical properties and flame retardant properties have been significantly improved.