▎ 摘　　要

Graphene nanoribbons (GNRs), obtained by different methods from carbon nanotubes (CNTs) or graphene, are attractive materials for polymer nanocomposites due to their considerably high interfacial area, as compared to CNTs. Consequently, a better adhesion with a polymer matrix is anticipated for GNRs. Also, surface modification of these nanofillers, such as nitrogen doping, is known to be an efficient method to improve their properties. In this work, fluoroelastomers (FKM) were used as the polymer matrix to host GNRs. Undoped and nitrogen doped GNRs were synthesized from the parent multiwall carbon nanotubes (MWCNTs). MWCNT/FKM and GNR/FKM nanocomposites were prepared via a solution mixing/melt mixing protocol. Adding nanofillers can affect the crosslinking density of cross-linked polymers, such as elastomers and rubbers. The effect of interfacial interaction between the functional groups on the surface of the GNR and FKM matrix have been studied in this project. Our results showed that the concentration and type of the surface functional groups were the main contributors in determining the cure behavior of the nanocomposites. While reduced nitrogen doped GNR (CNx-GNR) had a similar cure behavior as neat FKM, oxidized GNRs had relatively slower cure kinetics. These observations were found to be correlated with the presence of a hydroxyl functional group on the surface of oxidized GNRs (CNx-GONR). (C) 2014 Elsevier Ltd. All rights reserved.