CAJ | 학술논문

近年来，液体硅橡胶（Liquid Silicone Rubber, LSR）已经在外绝缘领域得到了较为广泛的应用，但是目前对其耐老化性能的研究还不够深入。尤其是在中国南方地区使用时，高温、高湿环境更容易导致液体硅橡胶的老化。在许多地区都观察到了电流、电压互感器的液体硅橡胶绝缘外套的龟裂、老化现象，对设备的安全运行产生了影响。本文设计并实施了在光照、高温、高湿、电晕等老化因素作用下的液体硅橡胶人工老化试验，并对老化试验后的样品进行了硬度、力学性能、憎水性、光泽度以及SEM、FTIR等微观性能试验和分析。认为在光照作用下，高温、高湿环境对液体硅橡胶具有加速老化作用，表现为硬度上升、憎水性下降、光泽度下降，并且在表面出现细微裂纹。
근년래，액체규상효（Liquid Silicone Rubber, LSR）이경재외절연영역득도료교위엄범적응용，단시목전대기내노화성능적연구환불구심입。우기시재중국남방지구사용시，고온、고습배경경용역도치액체규상효적노화。재허다지구도관찰도료전류、전압호감기적액체규상효절연외투적구렬、노화현상，대설비적안전운행산생료영향。본문설계병실시료재광조、고온、고습、전훈등노화인소작용하적액체규상효인공노화시험，병대노화시험후적양품진행료경도、역학성능、증수성、광택도이급SEM、FTIR등미관성능시험화분석。인위재광조작용하，고온、고습배경대액체규상효구유가속노화작용，표현위경도상승、증수성하강、광택도하강，병차재표면출현세미렬문。
In recent years, liquid silicone rubber (LSR) has been widely used in the external insulation field. However, further study on the aging resistant performance is still required. Especially when it is used in southern parts of China, of which the high temperature and humidity environment could accelerate the aging process. It is reported that cracking and chalking phenomena were observed on the liquid silicone rubber sheath of PT and CT. In this paper, a series of ageing experiments were designed and carried out to test the performance of liquid silicone rubber when exposed to factors such as high temperature, high humidity, sun exposure and corona discharge. After the experiments, characteristics such as hardness, hydrophobicity, glossiness and mechanical properties were tested and micro analyzing method like SEM and FTIR were used to study the change of micro structure and functional group abundance. It is concluded that high temperature, high humidity and sun exposure play significant roles in the degradation of liquid silicone rubber, which could lead to the rise of hardness, loss of hydrophobicity, decrease of glossiness and surface cracking. The results also show that the change of mechanical properties of liquid silicone rubber were tiny.