Nguyen Trung Thanh

Main Article Content

Abstract

This article presents the effects of toluene diisocyanate (TDI) on electrical properties of ester epoxy alkyd varnish. Through testing on breakdown voltage, dielectric constant, block resistivity, Tang (Tg) dielectric loss, the electrical properties of varnish were investigated. When TDI amount increased from to 4 - 10 (w/100w of epoxy resin), the breakdown voltage increased from 21.78 to 65.69 KV/mm. With TDI of 8 - 10 w/w, the dielectric constant was the best, about 2.78 - 3.02. With TDI of 8 w/w, the block resistivity was 6.8.1014 W.cm and Tg dielectric loss was 0.0069. The article also presents the effect of TDI on solvent- and heat resistance of the varnish.

Keywords: Ester epoxy alkyd v, electrical properties, solvent resistance, heat resistance.

References

[1] B.J. Rohde, M.L. Robertson, Ramanan Krishnamoorti, Concurrent curing kinetics of an anhydride-cured epoxy resin and polydicyclopentadiene, Polymer 69 (2015) 204- 214.
[2] Pham Gia Vu, To Thi Xuan Hang, Vu Ke Oanh, Trinh Anh Truc, Thai Thu Thuy, Study on anti-corrosion protection ability of epoxy coating CNT/ZnO-clay nanocomposite, Vietnam Journal of Chemistry 55 (2017) 308-312. https://doi.org/ 10.15625/0866-7144.2017-00464 (In Vietnamese).
[3] Mohammad Palimi, Eiman Alibakhshi, G. Bahlakeh, B. Ramezanzadeh, Electrochemical investigations of the corrosion protection properties of an epoxyester coating filled with cerium acetyl acetonate anticorrosive pigment, Electrochemical Society 164 (2017) 709–716.
[4] Ghodsieh Mashouf Roudsari, Amar K. Mohanty, Manjusri Misra, Study of the Curing Kinetics of Epoxy Resins with Biobased Hardener and Epoxidized Soybean Oil, ACS Sustainable Chemical Engineering 9 (2014) 2111-2116.
[5] Piotr Czub, Ilona Franek, Epoxy resins modified with palm oil derivatives preparation and properties, Polimery 58 (2013) 135-139.
[6] R. Jack, A.U. Anya, O.F. Osagie, Comparative Studies of Oil-Modified Alkyd Resins Synthesized from Epoxidized and Crude Neem Oil, American Journal of Applied Chemistry 4 (2016) 120-124.
[7] Naheed Saba, Mohammad Jawaid, Othman Y Alothman, Paridah M. Tahir, Recent advances in epoxy resin, natural fiber-reinforced epoxy composites and their applications, Journal of Reinforced Plastics and Composites 35 (2016) 447-
470.https://doi.org/10.1177/0731684415618459.
[8] Pronob Gogoi, Monalisha Boruah, Shyamalima Sharma, Swapan K. Dolui, Blends of Epoxidized Alkyd Resins Based on Jatropha Oil and the Epoxidized Oil Cured with Aqueous Citric Acid Solution: A Green Technology Approach. ACS Sustainable Chemical Engineering 2 (2015) 261-268.
[9] Suzanne Morsch, Yanwen Liu, Polly Greensmith, Stuart B. Lyon, Simon R. Gibbon, Molecularly controlled epoxy network nanostructures, Polymer 108 (2017) 146-153.
[10] Fanica Mustata, Nita Tudorachi, Dan Rosu, Curing and Thermal Behavior of Resin Matrix for Composites Based on Epoxidized Soybean Oil/Diglycidyl Ether of Bisphenol A, Engineering 42 (2011) 1803-1812.
[11] Jie Zhang, Sheng Hu, Guozhu Zhan, Xiaolin Tang, Yingfeng Yu, Biobasednanocomposites from clay modified blend of epoxidized soybean oil and cyanate ester resin, Progress in Organic Coatings 76 (2013) 1683–1690.
[12] A. Sienkiewicz, P. Czub, Novel bio-based epoxy-polyurethane materials from modified vegetable oils – synthesis and characterization, eXPRESS Polymer Letters 11 (2017) 308-319.