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http://dx.doi.org/10.5370/JEET.2018.13.2.892

The Effect of Hygrothermal Aging on the Properties of Epoxy Resin  

Wang, Youyuan (Dept. of Electrical Engineering, Chongqing University)
Liu, Yu (Dept. of Electrical Engineering, Chongqing University)
Xiao, Kun (Dept. of Electrical Engineering, Chongqing University)
Wang, Can (Dept. of Electrical Engineering, Chongqing University)
Zhang, Zhanxi (Dept. of Electrical Engineering, Chongqing University)
Publication Information
Journal of Electrical Engineering and Technology / v.13, no.2, 2018 , pp. 892-901 More about this Journal
Abstract
Because of excellent electrical properties, epoxy resin is widely used in packaging and casting power equipment. Moisture and temperature in the environment are inclined to seriously affect the insulation tolerance of epoxy resin. This work focuses on the aging characteristics of epoxy resin in hygrothermal environment. Scanning electron microscopy images show that there are micro-crack, micro-slit and holes inside aged samples. The moisture absorption process undergoes three equilibrium stages and it does not follow the Fick's second law. Observing the change of hydrogen bonds in the infrared spectra of the dried samples, it is found that chemically moisture absorption immerges when the physical moisture absorption entered the third equilibrium stage. By Debye equation to fit the imaginary part of the dielectric constant, it is concluded that the uniformity of water molecule has a great influence on the electrical conductivity loss. Furthermore, the polarization loss can be more easily affected by water molecules than small free molecules. After the aged samples being dried, their real and imaginary part of the dielectric constant descend, but their original electrical properties cannot completely restored. After chemical moisture absorption appears inside the material, the residual space charges increase significantly and the charge dissipation rate slow down obviously.
Keywords
Epoxy resin; Hygrothermal aging; Equilibrium stage; Debye equation; Space charge;
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1 Chhanda N. J., Suhling J. C. and Lall P., "Effects of Moisture Exposure on the Mechanical Behavior of Polymer Encapsulants in Microelectronic Packaging," ASME 2013 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems, 2013.
2 Bhatti I. S. and Yan Z., "Comparative hygrothermal ageing analysis of glass and carbon fiber polymer composites: Numerical and experimental study," International Bhurban Conference on Applied Sciences and Technology. IEEE, 2015.
3 Bao L. R. and Yee A. F., "Effect of temperature on moisture absorption in a bismaleimide resin and its carbon fiber composites," Polymer, vol. 43, pp. 3987-3997, 2002.   DOI
4 Bao L. R. and Yee A. F., "Moisture diffusion and hygrothermal aging in bismaleimide matrix carbon fiber composites-part I: uni-weave composites," Composites Science & Technology, vol. 62, pp. 2099-2110, 2002.   DOI
5 Adamson M. J., "Thermal expansion and swelling of cured epoxy resin used in graphite/epoxy composite materials," Journal of Materials Science, vol. 15, pp. 1736-1745, 1980.   DOI
6 Zheng Q. and Morgan R. J., "Synergistic Thermal-Moisture Damage Mechanisms of Epoxies and Their Carbon Fiber Composites," Journal of Composite Materials, vol. 27, pp. 1465-1478, 1993.   DOI
7 Soles C., and Yee, A. F., "A discussion of the molecular mechanisms of moisture transport in epoxy resins," Journal of Polymer Science Part B Polymer Physics, vol. 38.5, pp. 792-802, 2000.   DOI
8 Zou C., Fothergill J. C. and Rowe S. W., "The effect of water absorption on the dielectric properties of epoxy nanocomposites," IEEE Transactions on Dielectrics & Electrical Insulation, vol. 15, pp. 106-117, 2008.   DOI
9 Jefferson G. D., Farah B., Hempowicz M. L. and Hsiao K. T., "Influence of hygrothermal aging on carbon nanofiber enhanced polyester material systems," Composites Part B Engineering, vol. 78, pp. 319-323, 2015.   DOI
10 Li Y., Li R., Huang L., Wang K. and Huang X., "Effect of hygrothermal aging on the damage characteristics of carbon woven fabric/epoxy laminates subjected to simulated lightning strike," Materials & Design, vol.99, pp.477-489, 2016.   DOI
11 Jr J. H. S. A., Souza S. D. B., Botelho E. C. and Amico S. C., "Carbon fiber-reinforced epoxy filamentwound composite laminates exposed to hygrothermal conditioning," Journal of Materials Science, vol. 51, pp. 4697-4708, 2016.   DOI
12 Rain P., Brun E., Guillermin C. and Rowe S., "Hygrothermal ageing of a filled epoxy resin: measurements of the insulation properties and qualitative modelling," 2010 International Conference on Solid Dielectrics, Potsdam, Germany, 4-9 July, 2010.
13 Dogan A. and Atas C., "Variation of the mechanical properties of e-glass/epoxy composites subjected to hygrothermal aging," Journal of Composite Materials, vol. 50, no.1, 2016.
14 Zhao Y., Wang Z., Keey S. L. and Chai G. B., "Longterm viscoelastic response of e-glass/bismaleimide composite in seawater environment," Applied Composite Materials, vol. 22, pp. 693-709, 2015.   DOI
15 Haghighi-Yazdi M. and Lee-Sullivan P., "FTIR analysis of a polycarbonate blend after hygrothermal aging," Journal of Applied Polymer Science, vol. 132, no. 3, 2015.
16 Barbes, L., Radulescu, C. and Stihi, C., "Atr-ftir spectrometry characterisation of polymeric materials," Romanian Reports in Physics, vol. 66.3, 2014.
17 Pan Hong and Zhao Tao, "Antibacterial property of fabric treated with a fiber-reactive chitosan derivative," Journal of Textile Research, vol. 32.2, pp. 96-101, 2011.
18 Xiao G. Z., Delamar M. and Shanahan M. E. R., "Irreversible interactions between water and dgeba/ dda epoxy resin during hygrothermal aging," Journal of Applied Polymer Science, vol. 65, pp. 449-458, 2015.
19 Adamson M J., "Thermal expansion and swelling of cured epoxy resin used in graphite/epoxy composite materials," Journal of Materials Science, vol. 15, pp. 1736-1745, 1980.   DOI
20 Rain P., Brun E., Guillermin C. and Rowe S. W., "Experimental model of a silica/epoxy interface submitted to a hygrothermal aging: a dielectric characterization," IEEE Transactions on Dielectrics & Electrical Insulation, vol. 19, pp. 343-351, 2010.
21 Pan Zuren, Polymer Chemistry, Enhanced Edition, Chemical Industry Press, 2007, p. 362-363.
22 Wang M. Xu X., Ji J., Yang Y., Shen J. and Ye M., "The hygrothermal aging process and mechanism of the novolac epoxy resin," Composites Part B Engineering, vol. 107, pp. 1-8, 2016.   DOI
23 Zhao X., Liao R., Liang N., Yang L. and Li J., "Role of defects in determining the electrical properties of ZnO ceramics," Journal of Applied Physics, vol. 116, pp.014103-014103-10, 2014.
24 Jia R., Zhao X., Li J. and Tang X., "Colossal breakdown electric field and dielectric response of Al-doped $CaCu_3Ti_4O_{12}$ ceramics," Materials Science & Engineering B, vol. 185, pp.79-85, 2014.   DOI
25 Rhaiem A. B., Hlel F., Guidara K. and Gargouri M., "Dielectric relaxation and ionic conductivity studies of $[N(CH_3)_4]_2Cu_{0.5}Zn_{0.5}Cl_4$," Journal of Alloys & Compounds, vol. 463, pp. 40-445, 2008.
26 Jiang Z, "Simulation and analysis of leakage magnetic field in epoxy resin cast dry-type transformer with typical structure," Transformer, 2017.
27 Lin Y. C., Chen X. and Wang. Z. P., "A study of degradation of ACF joints in chip-on-glass assenblies," Thermal and Thermomechanical Phenomena in Electronics Systems, 2006.
28 Park C. H., Lee S. J. Lee, T. H. and Kim H. J., "Characterization of an acrylic pressure-sensitive adhesive blended with hydrophilic monomer exposed to hygrothermal aging: assigning cloud point resistance as an optically clear adhesive for a touch screen panel," Reactive and Functional Polymers, vol. 100, pp. 130-141, 2016.   DOI
29 Liang Mu and Wong K. L., "Electrical performance of epoxy resin filled with micro particles and nanoparticles," Energy Procedia, vol. 110, pp. 162-167, 2017.   DOI
30 Zhang Y. L., Shi, X. Q. and Zhou W., "Effect of hygrothermal aging on interfacial reliability of flip chip on board (FCOB) assembly," Electronics Packaging Technology Conference, 2004.
31 Grammatikos S., Mark E. and Ball R. J., "Effects of hygrothermal aging on pultruded glass fibre reinforced polymers: a complimentary study," International Conference on Advanced Composites in Construction Acic, 2015.