熔融复合法制备邻甲酚醛环氧树脂/凹凸棒土纳米复合材料

摘要

通过对凹凸棒土(AT)进行有机改性,得到有机化凹凸棒土(OAT),并对其进行FTIR和XRD表征,结果表明,表面活性剂是以物理吸附形式存在于凹凸棒土棒晶的外表面上.采用熔融复合法制备了AT质量分数为1%～5%的邻甲酚醛环氧树脂/凹凸棒土纳米复合材料(ECN/OAT-x),并对复合材料进行SEM、DMA和TGA等表征.SEM结果表明OAT的加入使复合材料断裂由脆性断裂向韧性断裂转变.通过对复合材料的综合热性能分析和力学性能分析,ECN/OAT-3复合材料的拉伸强度、冲击强度和Tg比纯ECN分别高出54.3%、83.5%和39.6℃;复合材料的热稳定性也有明显提高.%Organic-attapulgite (OAT) was obtained by organic modification, and we characterized it by FTIR and XRD.The results showed that the physical adsorption was present in the outer surface of attapulgite crystal rods. Then the ECN/OAT-x (x=1 wt％ to 5wt％) nanocomposites were respectively prepared by melt polymerization. The nanocomposites were characterized by SEM, DMA, TGA and so on. The results showed that the addition of OAT made the compounds transform from brittle fraction to ductile fracture. The mechanical capability and thermal analysis of the nanocomposies were also measured. In contrast with pure ECN, the tensile strength, impact strength and Tg of ECN/OAT-3 were respectively improved by 54.3％, 83.5％ and 39.6℃. The thermal stability of nanocomposites was markedly improved.