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高压电器  2015 

干燥环境下紫外辐射对硅橡胶老化性能的影响

, PP. 129-132

Keywords: HTV硅橡胶,干燥,紫外老化,傅里叶变换红外光谱(FTIR),配方优化

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Abstract:

随着中国“西电东送”及特高压输电工程的展开,复合绝缘子厂家纷纷研制出适合特高压输电工程线路应用的特高压等级的复合绝缘材料。笔者针对哈密至郑州±800kV特高压直流输电工程在哈密段的复合绝缘子老化问题,提取哈密地区干燥强紫外辐射的气候特征,在干燥环境下对特高压等级的复合绝缘材料和普通电压等级的复合绝缘材料进行紫外加速老化实验。对实验样品进行静态接触角测试,硬度测试,傅里叶变换红外光谱(FTIR)分析。实验结果表明两种试样硬度均变大,憎水性均部分丧失,并有填充物外露;红外光谱中Si-CH3键和Si-O-Si键的峰面积均减小;在两种试样初始数据相近的情况下,特高压等级样品各个数据的变化量均小于普通等级样品。

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