Iraj Hasanzadeh - Polymer Science Department, Iran Polymer and Petrochemical Institute, P.O. Box: ۱۴۹۶۵/۱۱۵, Tehran, Iran
Amjad Sazgar - Polymer Science Department, Iran Polymer and Petrochemical Institute, P.O. Box: ۱۴۹۶۵/۱۱۵, Tehran, Iran
Mehdi Barikani - Polymer Science Department, Iran Polymer and Petrochemical Institute, P.O. Box: ۱۴۹۶۵/۱۱۵, Tehran, Iran
Khadijeh Didehban - Polymer Science Department, Iran Polymer and Petrochemical Institute, P.O. Box: ۱۴۹۶۵/۱۱۵, Tehran, Iran

Application of polymeric materials in some applications is inhibited due to their low thermal conductivity. In this study epoxy nanocomposites of three differently modified carbon nanotubes were prepared and their thermal, electrical and mechanical properties were investigated. Multiwallcarbon nanotubes due to their high thermal conductivity and low price are one of the best options to improve thermal properties of polymers and make highly conductive polymeric composites.Acidic oxidation, amine grafting and Fridel-Craft reaction were employed to prepare modified carbon nanotubes; then resulting nanotubes were sonicated with epoxy resin. During mixing process epoxy groups react with grafted functional groups (such as amine groups) and a gooddispersion is obtained. It was found that nanocomposites obtained by Fridel-Craft acylaion reaction have superior thermaland electrical conductivity compared to those prepared with acid oxidation and also a rigid intermediate between nanotube and matrices cause to better conductivity. Therefore addition of a very low amount of benzene tri carboxylic acid (BTC) modified nanotubes can result in a considerable improvement in thermal and electrical conductivity of resulting composite

Nanocomposites, Multiwall carbon nanotube, Chemical modification, Electrical properties, Thermal conductivity, Epoxy