Journal
ADVANCED COMPOSITES AND HYBRID MATERIALS
Volume 3, Issue 3, Pages 325-335Publisher
SPRINGERNATURE
DOI: 10.1007/s42114-020-00166-0
Keywords
Polymer composite; Conductivity; Dielectric; Tan loss
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In this work, three systems of the composite were prepared using cured epoxy (CE), unsaturated polyester (UP), and organically changed montmorillonite (OMMT) of CE-UP, CE-OMMT, and CE-UP-OMMT which have been developed and the samples were subjected to Fourier-transform infrared spectroscopy (FTIR), X-ray diffraction spectroscopy (XRD), electrochemical impedance spectroscopy (EIS), and scanning electron microscopy (SEM). EIS shows CE-OMMT composite of sample E3M has maximized the room temperature conductivity of the composite to 3.7976 x 10(-5) S/cm. The conductivity was enhanced to 7.5891 x 10(-5) S/cm on the addition of 5 wt% UP in CE-OMMT. This conductivity was further enhanced to 1.1023 x 10(-4) S/cm on the addition of 15 wt% of UP in CE-OMMT composite. The conductivity enhancement was found due to the long-range movement of charge carriers by folding/unfolding up of polymer chains accumulated in the composite. X-ray diffraction spectroscopy affirms the amorphous nature and FTIR proves the interaction between CE, UP, and OMMT composites. XRD and FTIR confirm the folding/unfolding up of polymer chains. Dielectric and dielectric loss tangent studies confirm the results obtained by conductivity. The SEM reveals aggregate microstructure for CE-UP-OMMT composite and provides the relevant reason for reduction in conductivity. All the outcomes are verifying that the conductivity enhancement in CE-UP-OMMT composite is due to the interaction and the newly formed bonds. Graphical abstract
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