Mechanical and thermal properties of epoxy-multiwall carbon nanotubes (MWCNTs) at different fractions (0.0, 0.25, 0.5, and 1.0 wt%) were investigated. The dispersion of the nanotubes in an epoxy adhesive commonly used in an automotive application was performed using a grease worker. This device has a perforated plate, able to produce mechanical shear. To investigate the behavior of adhesive-carbon nanotubes mixtures and the bonding performance, four groups were prepared using two different perforated plates, P1 and P2. All MWCNT-epoxy were submitted to extreme environmental conditions, resumed as reference (non-aged), 500 h at 100°C, 500 h at 95% of relative humidity at 40°C, and 500 h under salt spray. A reduction in glass transition temperature was observed with the addition of the nanofiller and no increases on statistic heat-resistant index temperature were noticed in MWCNT-epoxy produced using both plates. Changes in the peaks at 3300, 1510, and 835 cm⁻¹ after aging were seen in infrared spectra. The MWCNT addition to pure epoxy increased the apparent shear strength by 14% using P1. In P2, which has the mechanical shear greater by a factor of 2, no significant differences were observed, due to defects and agglomeration of MWCNTs observed by image analysis.

中文翻译：

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研究极端环境条件对多壁碳纳米管-环氧树脂胶粘剂和胶粘剂接头的影响

研究了不同比例（0.0、0.25、0.5 和 1.0 wt%）的环氧树脂多壁碳纳米管 (MWCNT) 的机械和热性能。纳米管在汽车应用中常用的环氧树脂粘合剂中的分散是使用油脂工人进行的。该装置有一个穿孔板，能够产生机械剪切。为了研究粘合剂-碳纳米管混合物的行为和粘合性能，使用两种不同的穿孔板 P1 和 P2 制备了四组。所有 MWCNT 环氧树脂均经受极端环境条件，作为参考（未老化）恢复，100°C 下 500 小时，40°C 下 95% 相对湿度下 500 小时，盐雾下 500 小时。通过添加纳米填料观察到玻璃化转变温度降低，并且在使用两种板生产的 MWCNT-环氧树脂中没有观察到统计耐热指数温度的增加。3300、1510 和 835 cm 处的峰变化在红外光谱中观察到老化后的^{-1 。}使用 P1 在纯环氧树脂中添加 MWCNT 可将表观剪切强度提高 14%。在 P2 中，由于图像分析观察到的 MWCNT 的缺陷和团聚，机械剪切力增加了 2 倍，因此没有观察到显着差异。