以双酚A型固态和液态环氧树脂按比例得到混合树脂，用微米级α-Al2O3改性制得GIS用氧化铝改性环氧浇注材料，并对其进行热学与力学性能研究。结果表明：环氧浇注材料随着升温速度的增大，玻璃化转变温度上升，常温下拉伸速度为10 mm/min时，试样的拉伸强度和弯曲强度分别为70.6 MPa和95.8 MPa，储能模量达到14263.1 MPa；在25~100℃，试样的拉伸强度、弯曲强度和冲击强度较稳定，冲击断面起伏大，为脆性断裂。当温度高于Tg时，试样的冲击强度显著增大，呈塑性断裂，断面较平整，材料的储能模量与损耗模量下降了2个数量级。
The epoxy casting materials modified by aluminum oxide for GIS was prepared from bisphe-nol A solid and liquid mix epoxy resin and micro α-Al2O3, and their thermal and mechanical properties were studied. The results show that with the increase of heating rate, the glass transition temperature of the epoxy casting materials increase. The tensile strength and flexural strength are 70.6 MPa and 95.8 MPa at room temperature under the tensile rate of 10 mm/min, and the storage modulus is 14 263.1 MPa. In the range of 25 ℃ to 100 ℃, the tensile strength, flexural strength, and impact strength are stable. The samples show brittle fracture and the impact fracture surface is rough. When the temperature is higher than Tg, the impact strength increases significantly, and the samples show plastic fracture and the impact fracture surface is flat, and the storage modulus and loss modulus decrease by two orders of magnitude.
参考文献
| [1] | 陈飞 .GIS设备的发展和应用研究[D].浙江大学,2007. |
| [2] | 费龙菲.高压开关用环氧浇注件耐热性能的研究[J].绝缘材料,2004(01):27-29. |
| [3] | 王蓉蓉;陈维;褚磊 等.氧化铝粉体对环氧浇注体系性能影响[J].绝缘材料通讯,1999,32(06):17-19. |
| [4] | 张斌,张会,孙明明,张旭刚,李坚辉,王磊.纳米氧化铝改性环氧树脂性能研究[J].化学与黏合,2009(05):15-17,29. |
| [5] | 王旗,李喆,尹毅,吴建东.微/纳米氧化铝/环氧树脂复合材料热导率和击穿强度的研究[J].绝缘材料,2013(02):49-52. |
| [6] | 田浩,郝留成,刘随军,袁端鹏,王海军,南传兴.GIS绝缘件用高性能环氧浇注材料的研究[J].绝缘材料,2013(03):9-13. |
| [7] | 于杰,金志浩,雷华,刘一春,罗筑.聚合物材料缺口冲击强度与断面粗糙度参数Rs的关系[J].高分子学报,1999(05):612-615. |
| [8] | 贾志东,高乃奎,乐波,蒋雄伟,谢恒堃.基于动态力学参数研究环氧云母绝缘材料的老化特征[J].电工技术学报,2000(04):47-51. |
| [9] | J. Wolfrum;G. W. Ehrenstein;M. A. Avondet .Dynamical mechanical thermo analysis of high performance composites -- influences and problems[J].Journal of Composite Materials,2000(21):1788-1807. |
| [10] | 陆立明.热固性树脂[M].上海:东华大学出版社,2009 |
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