无卤阻燃环氧树脂在核电互感器中的应用研究

Research on the application of halogen-free flame retardant epoxy resin in nuclear power transformer

采用示差扫描量热分析和热重分析,冲击强度和介电强度测试及垂直燃烧试验研究了填料和固化工艺对HE3271无卤阻燃环氧材料性能的影响。结果表明,HE3271的玻璃化温度85℃,热分解温度(DTG)387.8℃,热稳定性优良,阻燃等级达到UL94-2013 Rev.2016标准的V0级,填料的加入导致冲击强度迅速降低,但对电性能影响不大。填料最佳添加质量分数为300%,固化工艺为130℃下固化12 h。采用HE-3271环氧树脂浇注的LZZBJ9-10型核电用互感器通过了环境温度试验和工频耐压及局部放电测试。

The effect of filler and curing process on the properties of HE3271 halogen-free flame retardant epoxy materials was investigated by differential scanning calorimetry and thermogravimetric analysis,testings of impact strength and dielectric strength and vertical burning test. The results showed that the glass transition temperature and thermal decomposition temperature（DTG）of HE3271 was 85 ℃ and 387.8 ℃,respectively. The HE3271 had excellent thermal stability. The flame retardant grade of HE3271 reached V0 level for UL94-2013 Rev.2016 standard. The impact strength was rapidly decreased by adding the filler and the electrical performance was not affected. The best adding mass fraction of the filler was 300% and the best curing process was cured at 130 ℃ for 12 h. The LZZBJ9-10 nuclear power transformer with HE-3271 epoxy resin was passed through the ambient temperature test and the frequency withstand voltage and partial discharge test.