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Electrical, Mechanical, and Thermal Properties of Mg(OH)2/PI Nanocomposite Films

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Abstract

Nano-Mg(OH)2 particles were prepared by reverse precipitation. Nano-Mg(OH)2/PI composite films with varying contents of Mg(OH)2 were successfully prepared by in situ polymerization and thermal imidization. The surface morphology, thermal stability, and the mechanical and dielectric properties of the films were characterized. Results indicated the following: the nanoparticles were homogeneously dispersed in the matrix, thermal stability was reduced, and the Young’s modulus of PI-3% was 2851.6 N/mm2 and increased by 155% relative to that of neat PI. The real and imaginary parts of relative permittivity increased, and electric modulus formalism was introduced to determine the dielectric relaxation behavior of the composites in the study. The result from the Cole–Davidson semicircle showed that the increase in nano-Mg(OH)2 concentration led to an increase in the inhomogeneous distribution of relaxation time. Direct current illustrates that the activation energy of the hopping process exhibits an increasing trend. The aging threshold increased in accordance with the theory of space-charge limited current. Breakdown increased to 323 kV/mm, whereas the pure film was is 292 kV/mm, and the electric property of polyimide improved.

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Acknowledgements

This work was financially sponsored by the National Natural Science Foundation of China (No. 51277044).

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Authors and Affiliations

  1. College of Material Science and Engineering, Harbin University of Science and Technology, Harbin, 150040, People’s Republic of China

    Xiangwen Wang, Yong Fan, Hao Chen, Ruixiao Yang & Wei Zhao

  2. Key Laboratory of Engineering Dielectric and its Application, Ministry of Education, Harbin University of Science and Technology, Harbin, 150080, People’s Republic of China

    Yong Fan

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  1. Xiangwen Wang
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  2. Yong Fan
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  3. Hao Chen
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  4. Ruixiao Yang
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  5. Wei Zhao
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Correspondence to Yong Fan.

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Wang, X., Fan, Y., Chen, H. et al. Electrical, Mechanical, and Thermal Properties of Mg(OH)2/PI Nanocomposite Films. J Inorg Organomet Polym 27, 1778–1786 (2017). https://doi.org/10.1007/s10904-017-0641-6

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  • DOI: https://doi.org/10.1007/s10904-017-0641-6

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