Blending Modification of Alicyclic Resin and Bisphenol A Epoxy Resin to Enhance Salt Aging Resistance for Composite Core Rods

Polymers

Junwei Qi¹  Wanxian Wang¹  Yunpeng Liu¹  Hechen Liu¹  Mingjia Zhang¹  Jie Liu² 

[1] Hebei Provincial Key Laboratory of Power Transmission Equipment Security Defence, North China Electric Power University, Yonghua North Street No. 619, Baoding 071003, China;State Grid Hebei Electric Power Company Electric Power Research Institute, Xingan Street No. 200, Yuhua District, Shijiazhuang 050021, China;

关键词: DGEBA;    alicyclic epoxy resin;    blending modification;    salt corrosion resistance;    insulation performance;   

DOI  :  10.3390/polym14122394

来源: DOAJ

【 摘 要 】

In order to promote the application of composite insulators in coastal areas with high temperature, high humidity and high salt, it is of great importance to develop matrix resin with salt corrosion resistance for composite core rods. In this study, bisphenol A epoxy resin was modified by blending with alicyclic epoxy resin (2021P). Three different proportions of 2021P/DGEBA blend resins (0% 2021P/DGEBA, 10% 2021P/DGEBA and 20% 2021P/DGEBA) were prepared, and the high salt medium corrosion test was carried out. The physicochemical (FTIR, DMA, TGA) and electrical properties (dielectric loss, leakage current and breakdown field strength) of the blend resin before and after aging were tested and analyzed, and the optimal blend proportion was determined. The results showed that after salt aging, the Tg of 0% 2021P/DGEBA decreased to 122.99 °C, while the Tg of 10% 2021P/DGEBA reached 134.89 °C; The leakage current of 0% 2021P/DGEBA increased to 48.994 μA, while that of 10% 2021P/DGEBA only increased to 44.549 μA; The breakdown field strength of 0% 2021P/DGEBA dropped to 40.36 kv/mm, while that of 10% 2021P/DGEBA only dropped to 43.63 kv/mm. The introduction of 2021P enhanced the salt corrosion resistance of the blend resin, which could hinder the penetration, diffusion and erosion of external media (such as Na⁺, Cl⁻, H₂O, etc.) to the matrix resin. The comprehensive properties of 10% 2021P/DGEBA blend system reached the best, which was better than other blending resins, showing great application potential.

【 授权许可】

Unknown