Study on properties of RTV modified by recycled composite silicone rubber insulator powder
CAO Hong-wei1, ZHANG Xue-ying1, XU Run-hua2, GUO Ming-jia3, GUO Yang3, XI Zhi-chao3, XU Ri-wei2
1. The Electric Power Research Institute, State Grid Henan Company Limited, Zhengzhou 450052, China; 2. Beijing University of Chemical Technology, Beijing 100029, China; 3. Henan EPRI Hitech Group Co., Ltd., Zhengzhou 450001, China
Abstract: It is an important issue for the power industry to deal retionaly with a large number of spent silicone rubber composite insulators.In this paper,the surface of silicone rubber composite insulator powder is treated by silane coupling agent.The treated powder as a filling material is compounded with room temperature vulcanized silicone rubber (RTV).The effect of surface treatment is analyzed by infrared spectroscopy and thermal weight loss (TGA),and the properties and structures of the modified RTV are analyzed by universal material test machine,TGA,dynamic mechanical thermal analysis and scanning electron microscope.The experimental results show that silane coupling agents can perform effectively surface modification to silicone rubber composite insulator powder and vinyl triethoxysilane is a preferred silane coupling agent.The tensile strength of modified RTV is improved by 7%-23% when the adding amount of treated powder is in the range of 5%-35%.The glass transition temperature of the modified RTV remained unchanged in the range of -27℃ and -23℃,which is not affected by the powder.The temperature for maximum thermal decomposition rate of the modified RTV is increased to 532℃ and the modulus at 30℃ is increased by 7%-85%.The treated powder disperses evenly in the RTV matrix.Therefore,usinge spent silicone rubber composite insulator powder as filler for RTV is an effective way to recycle.
曹宏伟, 张雪盈, 徐润华, 郭洺伽, 郭阳, 席智超, 徐日炜. 退役硅橡胶复合绝缘子胶粉填充改性室温硫化硅橡胶的性能研究[J]. 现代化工, 2019, 39(4): 153-157.
CAO Hong-wei, ZHANG Xue-ying, XU Run-hua, GUO Ming-jia, GUO Yang, XI Zhi-chao, XU Ri-wei. Study on properties of RTV modified by recycled composite silicone rubber insulator powder. Modern Chemical Industry, 2019, 39(4): 153-157.
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