Title :
Evaluation of time variation of hydrophobicity of silicone rubber using dynamic contact angle measurement
Author :
Homma, Hiroya ; Lee, Chang-Ryong ; Kuroyagi, Toshiyuki ; Izumi, Kunikazu
Author_Institution :
Central Res. Inst. of Electr. Power Ind., Yokosuka, Japan
Abstract :
Dynamic contact angle measurements based on the Wilhelmy method were performed to evaluate the time variation of hydrophobicity of silicone rubber. The technique can determine both advancing and receding contact angles of a plate sample and evaluate the change of hydrophobicity in a short time. By changing the immersing time of silicone rubber into water, some aspects of overturn and/or re-orientation of polar groups at the surface were observed as a change of the contact angle. Also, the contact angle of silicone rubber was compared with that of fluorinated silicone rubber
Keywords :
contact angle; silicone rubber; silicone rubber insulators; surface tension; Wilhelmy method; advancing contact angle; dynamic contact angle measurement; fluorinated silicone rubber; hydrophobicity; immersing time; overturn; plate sample; polar groups; re-orientation; receding contact angle; silicone rubber; time variation; water; Contacts; Electric variables measurement; Force measurement; Goniometers; Insulation; Performance evaluation; Pollution measurement; Power measurement; Rubber; Time measurement;
Conference_Titel :
Properties and Applications of Dielectric Materials, 2000. Proceedings of the 6th International Conference on
Conference_Location :
Xi´an
Print_ISBN :
0-7803-5459-1
DOI :
10.1109/ICPADM.2000.876096
