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通过分子设计制备合成了含叠氮及苯并咪唑双官能团的偶联剂Azido-Benzimidazole(ABI),并考察了新型偶联剂对国产芳纶Ⅲ(DAF-Ⅲ)/聚三唑树脂(PTA)复合材料的界面增强作用。SEM、傅立叶变换衰减全反射红外光谱(ATR-FTIR)及XPS分析表明,ABI通过分子结构中的苯并咪唑基团与DAF-Ⅲ纤维形成分子间氢键,能够作用到DAF-Ⅲ上。FTIR及DSC分析表明,ABI中的叠氮基团与PTA树脂中的炔基发生反应,生成三唑环参与了PTA树脂的固化。经2.1wt%ABI处理后,DAF-Ⅲ/PTA树脂复合材料层间剪切强度(ILSS)和弯曲强度分别较未处理时提高了62.0%和43.7%。
Azido-Benzimidazole (ABI) was synthesized through the molecular design and the bifunctional coupling agent containing azide and benzimidazole was synthesized. The effects of the new coupling agent on the synthesis of domestic aramid fiber (DAF-Ⅲ) / polytriazole resin (PTA ) Composite interface enhancement. SEM, ATR-FTIR and XPS analysis indicated that ABI can act on DAF-Ⅲ by intermolecular hydrogen bonding with DAF-Ⅲ fiber via benzimidazole group in the molecular structure. FTIR and DSC analysis showed that azide groups in ABI reacted with alkynyl groups in PTA resin to form triazole ring and participated in the curing of PTA resin. After 2.1wt% ABI treatment, the interlaminar shear strength (ILSS) and flexural strength of DAF-III / PTA resin composites increased by 62.0% and 43.7%, respectively.