Water Absorptivity of High-temperature Vulcanized Silicone Rubber Under Atypical Contaminants

被引：0
|
作者：
Zhao L. [1 ]
Xu S. [1 ]
Wang Z. [1 ]
机构：
[1] College of Electrical Engineering, Sichuan University, Chengdu
来源：
Gaodianya Jishu/High Voltage Engineering | 2019年 / 45卷 / 07期
关键词：
And activation energy; Atypical contaminants; High-temperature vulcanized silicone rubber; Tensile strain; Water absorptivity;
D O I：
10.13336/j.1003-6520.hve.20190628012
中图分类号：
学科分类号：
摘要：
The dielectric loss heating of high-temperature vulcanized silicone rubber sheds and sheaths after water and moisture absorption may lead to the occurrence of local temperature rise in a silicone rubber composite insulator. The water and moisture absorptivity of a silicone rubber may be influenced by multiple factors. Consequently, we studied the influences of inorganic filler property, temperature, solution concentration and tensile strain on the water absorptivity of the silicone rubber immersed in the aqueous solutions of atypical contaminants, including sodium hydroxide, glucose and calcium sulfate, by using the weight method, and studied the effects of the solution immersion on the physicochemical properties of silicone rubber by using modern methods for material analysis. Results indicate that the hydrophobicity treatment on an inorganic filler surface weakens the water absorption of the silicone rubber immersed in the solutions, the tensile strain accelerates and increases its water absorption, and the high-temperature solution immersion lowers its activation energy and thermostability.The variation law of water absorptivity of the high temperature vulcanized silicone rubber in the atypical contaminants was supplementarily studied. © 2019, High Voltage Engineering Editorial Department of CEPRI. All right reserved.
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页码：2240 / 2248
页数：8
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