VA含量对封装材料EVA老化衰变行为的影响  

The Influence of VA Content on the Degradation Behavior of Encapsulant Material EVA

作　　者：张宗文[1] 严欢 韩会丽[2,3] ZHANG Zongwen;YAN Huan;HAN Huili(Laboratory Construction and Equipment Management Center,Xinyang Normal University,Xinyang 464000,China;Energy-Saving Building Materials Innovative Collaboration Center of Henan Province,Xinyang Normal University,Xinyang 464000,China;Shunde SYSU Institute for Solar Energy,Foshan 528300,China)

机构地区：[1]信阳师范学院实验室建设与设备管理中心,河南信阳464000 [2]信阳师范学院建筑节能材料河南省协同创新中心,河南信阳464000 [3]顺德中山大学太阳能研究院,广东佛山528300

出　　处：《信阳师范学院学报（自然科学版）》2022年第4期609-614,共6页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(12105239);河南省高等学校重点科研项目(21A480008);河南省科技攻关计划项目(212102210629);广东省基础与应用基础研究基金联合基金-青年基金项目(2019A1515111125)。

摘　　要：对同一厂家提供的4种不同醋酸乙烯脂(VA)含量的乙烯-醋酸乙烯酯共聚物(EVA)样品进行室内加速老化实验,通过测试EVA在室内加速老化后的黄变指数、傅里叶变换红外光谱(FTIR)、差示扫描量热曲线(DSC)及热重(TGA)等,研究VA含量对EVA老化衰变行为的影响。结果表明:当VA含量在28%~32%的范围内,与EVA的耐老化性能呈正相关,VA含量越高,EVA的耐老化性能越好;而当VA含量超过32%后,EVA的耐老化性能下降,老化速率加快。Four polyethylene vinyl acetate copolymer(EVA) samples with different contents of vinyl acetate(VA) provided by the same manufacturer are studied under the accelerated aging indoor. The influence of VA contents on the degradation behavior of EVA, such as the yellow index, Fourier Translation Infrared spectroscopy(FTIR), Differential Scanning Calorimetry(DSC) and Thermogravimetric Analysis(TGA), is tested and analyzed. The results show that the ageing-resistance of EVA is positively correlated with VA content in a certain range of 28%~32%, and the higher VA content is, the better ageing-resistance of EVA is. However, when the VA content exceeds 32%, the ageing-resistance of EVA decreases and the aging rate accelerates.

关 键 词：封装材料 VA含量 室内加速老化 耐老化性能 热性能 

分 类 号：TM325.5[电气工程—电机] TM615