摘要
为了评价新能源汽车驱动电机用浸渍树脂,选用市面上常见的环氧树脂和聚酯亚胺树脂两款材料,利用热失重和粘结强度测试比较两种浸渍树脂的相关性能,重点比较各项长期老化性能。结果表明:两种浸渍树脂的VOC含量和长期耐热性都符合要求,25℃下环氧树脂的粘结强度比聚酯亚胺树脂的高,但在150℃、180℃时快速下降。200℃下老化2000 h、高低温冲击600个循环、自动变速箱油(ATF油)浸泡下高低温8个循环、ATF油+0.5%水密闭浸泡下高低温8个循环、ATF油浸泡下150℃老化2000 h等试验对两种浸渍树脂粘结强度的影响类似。但ATF油+0.5%水密闭浸泡150℃老化条件下,环氧树脂的粘结强度在500、1000、1500、2000 h后只有初始值的16.41%、13.64%、4.29%、4.29%,而相同条件下聚酯亚胺的粘结强度均比初始值高。利用傅里叶红外光谱和X射线电子能谱对比分析了环氧树脂粘结强度大幅下降前后的结构变化和元素变化,推断高温下的水解是其粘结强度下降的主要原因。
In order to evaluate the impregnating resin for driving motor of new energy vehicles,epoxy resin and polyester imide resin were selected as research objects.The properties of the two impregnating resins were compared by thermal weight loss and bonding strength tests,and their long-term ageing characteristics were compared emphatically.The results show that the VOC content and long-term thermal resistance of the two impregnating resins meet the requirements.The bonding strength of epoxy resin is higher than that of polyester imide at 25℃,but decreases rapidly at 150℃and 180℃.Ageing at 200℃for 2000 h,high and low temperature impact for 600 cycles,high and low temperature for 8 cycles under ATF oil immersion,high and low temperature for 8 cycles under ATF oil+0.5%water closed immersion,and ageing at 150℃for 2000 h under ATF oil immersion experiments have similar effects on the bonding strength of the two impregnating resins.However,under the condition of ATF oil+0.5%water closed immersion at 150℃,the bonding strength of epoxy resin is only 16.41%,13.64%,4.29%,and 4.29%of the initial value after aged for 500,1000,1500,and 2000 h,while the bonding strength of polyester imide is higher than the initial value under the same condition.The structural and elemental changes of epoxy resin before and after its bonding strength decreasing significantly were compared by Fourier transform infrared spectroscopy and X-ray electron spectroscopy,it is inferred that the hydrolysis at high temperature is the main reason for the decline of bonding strength.
作者
魏雄强
刘全胜
曹元
WEI Xiongqiang;LIU Quansheng;CAO Yuan(Huayu Automotive Electric Drive System Co.,Ltd.,Shanghai 201323,China;Asia Insulation Materials(Shanghai)Co.,Ltd.,Shanghai 201201,China;Zhejiang Rongtai Technical Industry Co.,Ltd.,Jiaxing 314004,China)
出处
《绝缘材料》
CAS
北大核心
2022年第7期50-55,共6页
Insulating Materials
关键词
新能源汽车
驱动电机
浸渍树脂
热老化
ATF油
评价方法
new energy vchicle
driving motor
impregnating resin
thermal ageing
ATF oil
evaluation method
