Abstract
In this study, both epoxy resin and multi-wall carbon nanotubes (MWCNTs) were modified with 3-isocyanato-propyltriethoxysilane (IPTES). Scanning electron microscopy and transmission electron microscopy microphotographs show that the MWCNTs dispersed well in the epoxy matrix. The molecular motion of silane-modified MWCNT/epoxy composites was studied using high-resolution solid-state 13C NMR. Results show that 1 wt% silane-modified MWCNT/epoxy composite exhibits less molecular motion than composite with a lower silane-modified MWCNT content. The glass transition temperature (Tg) of the neat epoxy is 192.6°C and increases to 212.5°C with 1 wt% IPTES-MWCNT content. Dynamic mechanical analysis data of the MWCNT/epoxy composites show the storage modulus at 50°C and the Tg of the IPTES-modified epoxy increased with IPTES-MWCNT content.
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