International Journal of Materials Science and Applications

Research Article | | Peer-Reviewed |

Dielectric Relaxation, Electric Conductivity and Thermodynamic Studies on Epoxy Polyurethane Blend and Their Composites

Received: Dec. 30, 2023    Accepted: Jan. 18, 2024    Published: Feb. 01, 2024
Views:       Downloads:

Share

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.

DOI 10.11648/ijmsa.20241301.12
Published in International Journal of Materials Science and Applications ( Volume 13, Issue 1, February 2024 )
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

Keywords

Dielectric Constant, Dielectric Relaxation, Dissipation Factor, Epoxy-Based Polymer Composites, Relaxation Time

References
[1] A. G. MacDiarmid, and A. J. Epstein,” Polyanilines: a novel class of conducting polymers” ,Faraday Discuss. Chem. Soc., 88, (1989), 317.
[2] M. Kaneko, and H. Nakamura, “Photoresponse of a liquid junction polyaniline film “, J. Chem. Soc. Chem. Comm., (1985), 1441.
[3] Irum Rafique, Ayesha Kausar, Zanib Anwar, and Bakhtiar Muhammad,” Exploration of Epoxy Resins, Hardening Systems, and Epoxy/Carbon Nanotube Composite Designed for High Performance Materials: A Review”, polymer plastic Technology and engineering, (2016), VOL. 55, NO. 3, 312–3334.
[4] Thakur AS, Sharma N, Kango S, Sharma S., “Effect of nanoparticles on epoxy based composites: A short review. Materials Today”: Proceedings, (2021) ;44, PP,4640-4642.
[5] Jianxin Zhang, Mingliang Ma, Yuxin Bi, Zijian Liao, Yong Ma , Weibo Huang, Ping Lyu , Chao Feng. “A review of epoxy-based composite materials: Synthesis, structure and application for electromagnetic wave absorption”, J. of alloys and composites, V922, (2022); 166096.
[6] Hideyuki Nakano, Masahiko Ishiia and Hiroshi Nakamuraa,” Preparation and structure of novel siloxene nanosheets”, chemical communication, 23, (2005), 317.
[7] Sammani Ali Shokralla and Nyef. S. Al Muikel, “Thermal properties of epoxy (DGEBA)/phenolic resin (NOVOLAC) blends”, The Arabian Journal for Science and Engineering, (2004), Vol 35, No 1B.
[8] T. Jeevanada and Siddaramaiah, “Synthesis and Characterization of Polyaniline Filled PU/PMMA Interpenetrating Polymer Networks”, Euro. Polymer. J,39(2003), pp, 569–578.
[9] asidharan S, Anand A. “Epoxy based hybrid structural composites with nanofillers”: A review. Industrial and Engineering Chemistry Research. (2020), 59; PP12617-12631.
[10] R. A. Pearson and A. F. Yee, “Toughening Mechanisms in Thermoplastic-Modified Epoxies. I: Modification Using Poly (phenylene Oxide”, Polymer, 34(1993), p. 3658.
[11] Jose AS, Athijayamani A, Jani SP. “A review on the mechanical properties of bio waste particulate reinforced polymer composites”. Materials Today: Proceedings. (2021), 37, PP 1757-1760
[12] M. I. Sarwar, Z. Ahmad,” Interphase bonding in organic–inorganic hybrid materials using aminophenyltrimethoxysilane” Euro. Polym. J., 36, (2000), 89.
[13] S. R. Elliot,” A. c. conduction in amorphous chalcogenide and pnictide semiconductors” Adv. In. Phys., V 36, 2, (1987), 135.
[14] I. G. Austin and N. F. Mott,” Polarons in crystalline and non-crystalline materials”, Adv. Polymer, 18, (1969), 4.
[15] N. F. Mott and E. A. Davis, Electronic Processes in Non-Crys. Materials, Oxford Univ. Press, (1971).
[16] H. A. Pohl and M. Pollok, “Dielectric dispersion in some polymers and polyelectrolytes: A model “J. Chem. Phys.", 63, (1975), 2980.
[17] A. M. Abo El Ata, M. A. Ahmed, “Dielectric and AC conductivity for BaCo2−xCuxFe16O27 ferrites”, Journal of Magnetism and Magnetic Materials vol.208(1-2),( 2000); pp. 27-36.
[18] T. Tsutsui, T. Sato and T. Tanaka,” Role of electrostatic forces in the glass transition temperatures of ionic polymers”, J. Polym. Sci. Polym. Phys., B13, (1977), 2091.
[19] R. Seymour, Polymer Composites, VSP, Utrecht, Netherlands, (1990).
[20] Yunliang Jiang, Xuejun Shi, Yuezhan Feng, Shuai Li, Xingping Zhou, Xiaolin Xi," Enhanced thermal conductivity and ideal dielectric properties of epoxy composites containing polymer modified hexagonal boron nitride”,Composites Applied Science: part A and Manufacturing,(2018); pp 657-664.
[21] L. H. Sperling, Interpenetrating Polymer Network, Plenum, New York, (1981).
[22] Zhengdong Wang , Mengmeng Yang , Yonghong Cheng, Jingya Liu , Bing Xiao , Siyu Chen , Jialiang Huang , Qian Xie , Guanglei Wu , Hongjing Wu ,” Dielectric properties and thermal conductivity of epoxy composites using quantum-sized silver decorated core/shell structured alumina/polydopamine”, Composites Applied Science: part A and Manufacturing,(2019); pp 303-311.
[23] R. A. Street and A. D. Yoffe,” Temperature dependence of AC conductivity of thin evaporated films of As2S3, As2Se3, As4S4 and Se”, J. Non Crys. Solids, 8-10, (1972), 745.
Cite This Article
  • 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

    Copy | Download

    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

    Copy | Download

    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

    Copy | 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://download.sciencepg.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}
    }
    

    Copy | Download

  • 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  - 

    Copy | Download

Author Information
  • Department of Physics, Faculty of Science, Al-Baha University, Al-Baha, Saudi Arabia

  • Section