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采用间氨基苯乙炔(APA)功能化改性氧化石墨烯(GO),通过X射线衍射分析,红外光谱和X光电子能谱等手段证明APA已经成功接枝到GO表面,制得改性氧化石墨烯(GOAPA)。借助超声波作用使得GOAPA均匀分散在聚三唑单体中,用原位聚合法制备聚三唑/石墨烯(PTA/GOAPA)复合材料。采用透射电子显微镜考察了GOAPA在基体树脂中的分散情况,通过示差扫描量热分析、动态力学热分析、热重分析和导热、导电性测试等后研究了GOAPA的添加量对PTA树脂固化行为、PTA/GOAPA复合材料性能的影响。结果表明,GOAPA的加入不影响PTA树脂的固化行为,与纯的PTA树脂相比,当GOAPA的添加质量分数为0.1%时,复合材料Tg达到最高为242℃,氮气中Td5为355℃,较纯PTA树脂分别提高了31℃和11℃。当GOAPA添加质量分数为1.0%时,PTA/GOAPA复合材料的导热系数提升了81%,电导率提升了75%。
The modified graphene oxide (GO) was functionalized with m-aminophenylacetylene (APA). The results showed that APA has been successfully grafted to the GO surface by X-ray diffraction analysis, infrared spectroscopy and X-ray photoelectron spectroscopy. Ene (GOAPA). GOAPA was homogeneously dispersed in poly (triazole) monomer by ultrasonic wave and poly (triazole / graphene) (PTA / GOAPA) composites were prepared by in situ polymerization. The dispersion of GOAPA in the matrix resin was investigated by transmission electron microscopy. The effects of the addition amount of GOAPA on the curing behavior of PTA resin were investigated by differential scanning calorimetry, dynamic mechanical analysis, thermal gravimetric analysis, thermal conductivity and conductivity testing. Effect of PTA / GOAPA Composites Properties. The results show that the addition of GOAPA does not affect the curing behavior of PTA resin. Compared with pure PTA resin, when the mass fraction of GOAPA is 0.1%, the Tg of composite reaches up to 242 ℃ and that of Td5 in nitrogen is 355 ℃ Pure PTA resin increased by 31 ℃ and 11 ℃ respectively. The thermal conductivity of PTA / GOAPA composites increased by 81% and the conductivity increased by 75% when GOAPA was added by 1.0%.