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Impact of MgO nanofiller-addition on electrical and mechanical properties of glass fiber reinforced epoxy nanocomposites

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Abstract

Glass fiber reinforced epoxy nanocomposites are synthesized with different weight percentages of MgO nanofillers to improve their mechanical and electrical properties, especially for aerospace and high voltage insulation applications. Static contact angle studies have shown that 3 wt% MgO nanofiller added specimen has a higher contact angle, indicating a better surface profile. Marginal increment in real relative permittivity and dielectric loss tangent have been observed with the inclusion of MgO nanofillers. Pulsed Electro Acoustic (PEA) method was adopted for space charge measurement, which has shown hetero-charge accumulation in all the tested specimens. The amount of accumulated space charge density during poling period is lower and its decay rate during depoling is higher in 3 wt% MgO added specimen. Reduction in initial surface potential and increment in its lst decay rate was noticed after incorporation of MgO nanofillers. 3 wt% specimen has reflected a higher surface potential decay rate with reduced trap depth in comparison with other samples. Dynamic Mechanical Analysis (DMA) studies have shown increased storage modulus with a slight reduction in tan δ value after the inclusion of MgO nanofillers. In addition, the glass transition temperature and the activation energy of 3 wt% specimen were found to be higher compared to other specimens.

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Acknowledgements

Author (RS) wishes to thank CPRI, Bangalore, India for sponsoring the project (NPP/2016/TR/1/27042016) on nanocomposites

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  1. Department of Electrical Engineering, Indian Institute of Technology Madras, Chennai, 600036, India

    Janjanam Naveen, Myneni Sukesh Babu & Ramanujam Sarathi

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  1. Janjanam Naveen
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  2. Myneni Sukesh Babu
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  3. Ramanujam Sarathi
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Correspondence to Ramanujam Sarathi.

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Naveen, J., Babu, M.S. & Sarathi, R. Impact of MgO nanofiller-addition on electrical and mechanical properties of glass fiber reinforced epoxy nanocomposites. J Polym Res 28, 377 (2021). https://doi.org/10.1007/s10965-021-02746-0

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