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Effect of reduced graphene oxide on the solvent transport characteristics and sorption kinetics of fluoroelastomer nanocomposites.

Abstract

The solvent transport characteristics of fluoroelastomer/reduced graphene oxide nanocomposites (FKM/mRGO) in homologues series of aromatic hydrocarbons are depicted in the present study. The solvent diffusion characteristics of the nanocomposites were analyzed in terms of mRGO loading, nature of solvent such as molar volume, solubility parameter, density and temperature varying from room temperature to 60 °C. The parameters such as equilibrium solvent uptake, diffusivity, sorptivity, and permeability were analyzed and found to be decreasing with increase in filler content. This is mainly attributed to the decrease in free volume with increasing concentration of mRGO due to the improved filler- elastomer interactions that hinders the solvent transport. Swelling parameters such as swelling coefficient and swelling index were analyzed to study the polymer-filler interactions. Diffusion studies with respect to temperatures were used to estimate the enthalpy, entropy and free energy change of the diffusion process. The molecular mass between crosslinks and hence the crosslink densities were calculated from the experimental data and the reinforcement effect of mRGO was confirmed by the decrease in Mc values and increase in crosslink densities. Theoretical models namely phanton and affine were compared with the experimental values and shown moderate agreement with affine network models.

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Publication details

The article was received on 16 Apr 2018, accepted on 04 Jun 2018 and first published on 04 Jun 2018


Article type: Paper
DOI: 10.1039/C8CP02411A
Citation: Phys. Chem. Chem. Phys., 2018, Accepted Manuscript
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    Effect of reduced graphene oxide on the solvent transport characteristics and sorption kinetics of fluoroelastomer nanocomposites.

    G. Moni, J. Abraham, A. Joseph, C. Kurian and S. C. George, Phys. Chem. Chem. Phys., 2018, Accepted Manuscript , DOI: 10.1039/C8CP02411A

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