EVA/Mg（OH）2高填充复合体系热老化性能研究  

Research on Thermal Aging Properties of EVA/Mg（OH）2 High-Filled Composite System

作　　者：陈子涵 皮昊书 彭云舜 李喆 宋书生 徐曼[2] Chen Zihan;Pi Haoshu;Peng Yunshun;Li Zhe;Song Shusheng;Xu Man(Shenzhen Futian Power Supply Bureau,Shenzhen518000,China;School of Electrical Engineering,Xi＇an Jiaotong University,Xi＇an 710049,China)

机构地区：[1]深圳福田供电局,广东深圳518000 [2]西安交通大学电气工程学院,陕西西安710049

出　　处：《塑料科技》2018年第11期25-29,共5页Plastics Science and Technology

摘　　要：将乙烯-乙酸乙烯共聚物（EVA）／Mg（OH）2高填充复合材料进行常规热老化，用扫描电镜观察试样老化前后的断面形貌，并对老化后试样的介电性能和力学性能进行测试。结果表明：表面处理荆．增容剂强化了EVA与填料之间的作用。阻燃增效剂具有软化界面．抑制热胀冷缩中界面裂纹形成的作用。三者合理配合，能调控界面，有效抑制复合体系在热老化过程中的界面劣化，提高其耐热老化性能；力学性能测试结果能够全面概括材料整体性能的变化趋势，但对于某个单一成分引起的变化需用其他方法进行研究。Ethylene-vinyl acetate copolymer （EVA）IMg（OH）2 high-filled composites were heat-aged. The fracture morphology of the samples before and after aging was observed by scanning electron microscope. The dielectric and mechanical properties of the samples after aging were tested. The results demonstrate that surface treatment agent and compatibilizer strengthen the interaction between EVA and filler. Flame retardant synergist can soften the interface and inhibit the formation of interracial cracks in the process of thermal expansion and cold shrinkage. The reasonable cooperation of three can adjust and control the interracial interaction, restrain the interface deterioration of composites in thermal aging process and improve the resistance to thermal aging effectively. The results of mechanical properties test can fully summarize the changing trend of the overall properties of materials, but the changes caused by a single component need to be studied by other methods.

关 键 词：乙烯-乙酸乙烯共聚物 氢氧化镁 热老化 介电性能 

分 类 号：TQ325.12[化学工程—合成树脂塑料工业]