The purpose of this study is to improve the dielectric properties of epoxy-based polymer composites by adding rock and glass wool to achieve a relatively high dielectric constant and lower dispersion; hence the dielectric relaxation of composite materials which combines of epoxy/polyurethane reinforced with fibrous materials (rock wool (RW) and glass wool (GW)) with constant weight fraction of (10%) were investigated. The data of AC conductivity have been analyzed in the light of different theoretical models based on correlated barrier hopping (CBH) and Maxwell-Wagner model. The dielectric measurements were carried out for all samples over the frequency range of (102-107) Hz and over temperature range of (293-463) K0. It is found that all samples displayed dielectric dispersion, thus the result for dielectric constant and dissipation factor give a direct evidence of the existence of Debye relaxation leaving a wide distribution of relaxation time. Eyring’s relaxation rate equation have been used to determine the thermodynamic parameters, Gibbs free energy of activations and enthalpy for all samples. The results showed the existence of a stronger intermolecular interaction in all samples.
| Published in | International Journal of Materials Science and Applications (Volume 13, Issue 1) |
| DOI | 10.11648/ijmsa.20241301.12 |
| Page(s) | 6-12 |
| Creative Commons |
This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited. |
| Copyright |
Copyright © The Author(s), 2024. Published by Science Publishing Group |
Dielectric Constant, Dielectric Relaxation, Dissipation Factor, Epoxy-Based Polymer Composites, Relaxation Time
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APA Style
Shokralla, E. A. (2024). Dielectric Relaxation, Electric Conductivity and Thermodynamic Studies on Epoxy Polyurethane Blend and Their Composites. International Journal of Materials Science and Applications, 13(1), 6-12. https://doi.org/10.11648/ijmsa.20241301.12
ACS Style
Shokralla, E. A. Dielectric Relaxation, Electric Conductivity and Thermodynamic Studies on Epoxy Polyurethane Blend and Their Composites. Int. J. Mater. Sci. Appl. 2024, 13(1), 6-12. doi: 10.11648/ijmsa.20241301.12
AMA Style
Shokralla EA. Dielectric Relaxation, Electric Conductivity and Thermodynamic Studies on Epoxy Polyurethane Blend and Their Composites. Int J Mater Sci Appl. 2024;13(1):6-12. doi: 10.11648/ijmsa.20241301.12
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Download@article{10.11648/ijmsa.20241301.12,
author = {Elsammani Ali Shokralla},
title = {Dielectric Relaxation, Electric Conductivity and Thermodynamic Studies on Epoxy Polyurethane Blend and Their Composites},
journal = {International Journal of Materials Science and Applications},
volume = {13},
number = {1},
pages = {6-12},
doi = {10.11648/ijmsa.20241301.12},
url = {https://doi.org/10.11648/ijmsa.20241301.12},
eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.ijmsa.20241301.12},
abstract = {The purpose of this study is to improve the dielectric properties of epoxy-based polymer composites by adding rock and glass wool to achieve a relatively high dielectric constant and lower dispersion; hence the dielectric relaxation of composite materials which combines of epoxy/polyurethane reinforced with fibrous materials (rock wool (RW) and glass wool (GW)) with constant weight fraction of (10%) were investigated. The data of AC conductivity have been analyzed in the light of different theoretical models based on correlated barrier hopping (CBH) and Maxwell-Wagner model. The dielectric measurements were carried out for all samples over the frequency range of (102-107) Hz and over temperature range of (293-463) K0. It is found that all samples displayed dielectric dispersion, thus the result for dielectric constant and dissipation factor give a direct evidence of the existence of Debye relaxation leaving a wide distribution of relaxation time. Eyring’s relaxation rate equation have been used to determine the thermodynamic parameters, Gibbs free energy of activations and enthalpy for all samples. The results showed the existence of a stronger intermolecular interaction in all samples.
},
year = {2024}
}
TY - JOUR T1 - Dielectric Relaxation, Electric Conductivity and Thermodynamic Studies on Epoxy Polyurethane Blend and Their Composites AU - Elsammani Ali Shokralla Y1 - 2024/02/01 PY - 2024 N1 - https://doi.org/10.11648/ijmsa.20241301.12 DO - 10.11648/ijmsa.20241301.12 T2 - International Journal of Materials Science and Applications JF - International Journal of Materials Science and Applications JO - International Journal of Materials Science and Applications SP - 6 EP - 12 PB - Science Publishing Group SN - 2327-2643 UR - https://doi.org/10.11648/ijmsa.20241301.12 AB - The purpose of this study is to improve the dielectric properties of epoxy-based polymer composites by adding rock and glass wool to achieve a relatively high dielectric constant and lower dispersion; hence the dielectric relaxation of composite materials which combines of epoxy/polyurethane reinforced with fibrous materials (rock wool (RW) and glass wool (GW)) with constant weight fraction of (10%) were investigated. The data of AC conductivity have been analyzed in the light of different theoretical models based on correlated barrier hopping (CBH) and Maxwell-Wagner model. The dielectric measurements were carried out for all samples over the frequency range of (102-107) Hz and over temperature range of (293-463) K0. It is found that all samples displayed dielectric dispersion, thus the result for dielectric constant and dissipation factor give a direct evidence of the existence of Debye relaxation leaving a wide distribution of relaxation time. Eyring’s relaxation rate equation have been used to determine the thermodynamic parameters, Gibbs free energy of activations and enthalpy for all samples. The results showed the existence of a stronger intermolecular interaction in all samples. VL - 13 IS - 1 ER -
Department of Physics, Faculty of Science, Al-Baha University, Al-Baha, Saudi Arabia
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