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Materiale Plastice
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https://doi.org/10.37358/Mat.Plast.1964

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Materiale Plastice (Mater. Plast.), Year 2020, Volume 57, Issue 1, 122-132

https://doi.org/10.37358/MP.20.1.5319

Adriana-Mariana Bors, Alina-Ruxandra Caramitu, Dorian Marin, Iosif Lingvay

The Hydrophily of Some Lacquers for Electrical Use


Abstract:
Through gravimetric determinations, volume resistivity, dielectric spectroscopy, and comparative thermal analysis (TG, DTA and DTG), the interactions between the distilled water and three different types of alkyd-epoxy-melamine, epoxy and polyurethane lacquers were studied. From the experimental determinations it was found that after 700 h of immersion in water at 20 ± 2°C the alkyd-epoxy-melamine based lacquer has a maximum water uptake, respectively 1.76%, followed by the epoxy lacquer 1.4% and polyurethane 0.93%. The thermal analysis sugests that because the water retained by the investigated polymers does not change the TG diagrams in the temperature range up to 150 °C, which suggests that the weight increase of the samples during the immersion could be due to some chemical processes between the water and polymer by which the chemistry structure of the polymer changes. Through electrical measurementes one can observe that after the immersion in water (over 700 hours), dielectric loss increases and the volume resistivity (measured in DC) of the investigated lakes decreases, which is explained by the increasing of polar groups (-OH) in the polymer structure. A comparative analysis of the experimental data reveals that in electrical applications the lacquer LS (polyurethane) is superior to the lacquers L-528 (alkyd-epoxy-melamine) and LG (epoxy), because it has no mass losses (structural changes) up to 280°C it has a volume resistivity of about 21 % higher than L-G, and about 300 % higher than L-528, and has water uptake and dielectric loss substantially lower comparing to L-528 and L-G.


Keywords:
lacquer for electrical use; water uptake; dielectric loss; volume resistivity; thermal analysis; water treeing

Issue: 2020 Volume 57, Issue 1
Pages: 122-132
Publication date: 2020/4/17
https://doi.org/10.37358/MP.20.1.5319
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Creative Commons License
This article is published under the Creative Commons Attribution 4.0 International License
Citation Styles
Cite this article as:
BORS, A., CARAMITU, A., MARIN, D., LINGVAY, I., The Hydrophily of Some Lacquers for Electrical Use, Mater. Plast., 57(1), 2020, 122-132.

Vancouver
Bors A, Caramitu A, Marin D, Lingvay I. The Hydrophily of Some Lacquers for Electrical Use. Mater. Plast.[internet]. 2020 Jan;57(1):122-132. Available from: https://doi.org/10.37358/MP.20.1.5319


APA 6th edition
Bors, A., Caramitu, A., Marin, D. & Lingvay, I. (2020). The Hydrophily of Some Lacquers for Electrical Use. Materiale Plastice, 57(1), 122-132. https://doi.org/10.37358/MP.20.1.5319


Harvard
Bors, A., Caramitu, A., Marin, D., Lingvay, I. (2020). 'The Hydrophily of Some Lacquers for Electrical Use', Materiale Plastice, 57(1), pp. 122-132. https://doi.org/10.37358/MP.20.1.5319


IEEE
A. Bors, A. Caramitu, D. Marin, I. Lingvay, "The Hydrophily of Some Lacquers for Electrical Use". Materiale Plastice, vol. 57, no. 1, pp. 122-132, 2020. [online]. https://doi.org/10.37358/MP.20.1.5319


Text
Adriana-Mariana Bors, Alina-Ruxandra Caramitu, Dorian Marin, Iosif Lingvay,
The Hydrophily of Some Lacquers for Electrical Use,
Materiale Plastice,
Volume 57, Issue 1,
2020,
Pages 122-132,
ISSN 2668-8220,
https://doi.org/10.37358/MP.20.1.5319.
(https://revmaterialeplastice.ro/Articlegs.asp?ID=5319)
Keywords: lacquer for electrical use; water uptake; dielectric loss; volume resistivity; thermal analysis; water treeing


RIS
TY - JOUR
T1 - The Hydrophily of Some Lacquers for Electrical Use
A1 - Bors, Adriana-Mariana
A2 - Caramitu, Alina-Ruxandra
A3 - Marin, Dorian
A4 - Lingvay, Iosif
JF - Materiale Plastice
JO - Mater. Plast.
PB - Materiale Plastice SRL
SN - 2668-8220
Y1 - 2020
VL - 57
IS - 1
SP - 122
EP - 132
UR - https://doi.org/10.37358/MP.20.1.5319
KW - lacquer for electrical use
KW - water uptake
KW - dielectric loss
KW - volume resistivity
KW - thermal analysis
KW - water treeing
ER -


BibTex
@article{MatPlast2020P122,
author = {Bors Adriana-Mariana and Caramitu Alina-Ruxandra and Marin Dorian and Lingvay Iosif},
title = {The Hydrophily of Some Lacquers for Electrical Use},
journal = {Materiale Plastice},
volume = {57},
number = {1},
pages = {122-132},
year = {2020},
issn = {2668-8220},
doi = {https://doi.org/10.37358/MP.20.1.5319},
url = {https://revmaterialeplastice.ro/Articlegs.asp?ID=5319}
}
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