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Volume 9
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10.3390/polym9080341
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Article

Theoretical Study on Decomposition Mechanism of Insulating Epoxy Resin Cured by Anhydride

by
Xiaoxing Zhang
1,*,
Yunjian Wu
1,
Xiaoyu Chen
2,
Hao Wen
1 and
Song Xiao
1
1
School of Electrical Engineering, Wuhan University, Wuhan 430072, China
2
State Grid Shaoxing Power Supply Company, Shaoxing 312000, China
*
Author to whom correspondence should be addressed.
Polymers 2017, 9(8), 341; https://doi.org/10.3390/polym9080341
Submission received: 11 July 2017 / Revised: 31 July 2017 / Accepted: 3 August 2017 / Published: 4 August 2017
(This article belongs to the Collection Polymeric Adhesives)
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Abstract

High temperatures caused by partial discharge results in the decomposition of insulating epoxy resins in electrical equipment. In this paper, the ReaxFF force field is used to investigate the decomposition process of epoxy resins cured by anhydride and the formation mechanisms of small-molecule gases. Results show that the initiation reaction is the cleavage of an ester bond linked with an epoxy resin. Produced by the decomposition of ester groups, CO2 is the first and most abundant product. Meanwhile, CH2O can be generated through three main ways, although the process still depends on the decomposition of epoxy functional groups. H2O is produced by free radical collision and dehydration. The production of small-molecule gases has the following sequence: CO2, CH2O, CO, and H2O. The produced gases have the following order according to amount: CO2, CH2O, H2O, and CO.
Keywords: anhydride; epoxy resin; decomposition; simulation anhydride; epoxy resin; decomposition; simulation

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MDPI and ACS Style

Zhang, X.; Wu, Y.; Chen, X.; Wen, H.; Xiao, S. Theoretical Study on Decomposition Mechanism of Insulating Epoxy Resin Cured by Anhydride. Polymers 2017, 9, 341. https://doi.org/10.3390/polym9080341

AMA Style

Zhang X, Wu Y, Chen X, Wen H, Xiao S. Theoretical Study on Decomposition Mechanism of Insulating Epoxy Resin Cured by Anhydride. Polymers. 2017; 9(8):341. https://doi.org/10.3390/polym9080341

Chicago/Turabian Style

Zhang, Xiaoxing, Yunjian Wu, Xiaoyu Chen, Hao Wen, and Song Xiao. 2017. "Theoretical Study on Decomposition Mechanism of Insulating Epoxy Resin Cured by Anhydride" Polymers 9, no. 8: 341. https://doi.org/10.3390/polym9080341

APA Style

Zhang, X., Wu, Y., Chen, X., Wen, H., & Xiao, S. (2017). Theoretical Study on Decomposition Mechanism of Insulating Epoxy Resin Cured by Anhydride. Polymers, 9(8), 341. https://doi.org/10.3390/polym9080341

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