Vacuum filtration method was used to fabricate robust multiwalled carbon nanotube buckypapers (MWCNT‐BPs). MWCNTs were functionalized by epoxy resin (diglycidyl ether of bisphenol A) to enhance their dispersibility. Fabricated BPs were immersed in epoxy hardner to covalently attach functional groups of MWCNTs to each other. Functionalization of MWCNTs was characterized qualitatively by Fourier transform infrared spectroscopy and quantitatively using thermogravimetric analysis. The morphology study of BPs was studied using scanning electron microscopy. Functionalization of MWCNTs resulted in more uniform and homogeneous BPs. Moreover, considerable improvements were achieved in the mechanical and electrical properties of BPs. POLYM. COMPOS., 38:2727–2733, 2017. © 2015 Society of Plastics Engineers

In this study, the effect of diamine molecular structure, attached to the multiwalled carbon nanotubes (MWCNTs), on the interfacial interactions of the MWCNTs and the epoxy matrix was studied. Pristine MWCNTs were successfully functionalized with multiple aliphatic and aromatic diamines. It has been found that, compared to aliphatic molecules, aromatic diamines can yield higher functionalization degree, due to higher activity and longer half-life of aromatic intermediates. However, at the same functionalization degree, the aliphatic ligands were more successful in reacting with epoxy chains and forming covalent bonds between the MWCNTs and the matrix. Considerable improvements were achieved in the mechanical properties of functionalized MWCNT-reinforced epoxy composites in comparison with the pristine MWCNT-reinforced composites. Fractography observations revealed distinct differences in the failure modes of reinforced composites after functionalization of the MWCNTs with diamines. POLYM. ENG. SCI., 59:1905-1910, 2019 EXPERIMENTAL MaterialsPristine multiwalled CNTs (MWCNTs) synthesized by chemical vapor deposition process (diameter 8-15 nm, length of 50 mm, and purity >95%) were acquired from Shenzhen Nano-Tech Port Co. Both epoxy EPL-219 (diglycidyl ether of bisphenol A) and associated curing agent EPH-5161 were purchased from Ghaffari Industrial Company (Iran). Aminobenzene (AB),

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