Journal of Radiation Research and Radiation Proces ›› 2015, Vol. 33 ›› Issue (4): 40301-040301.doi: 10.11889/j.1000-3436.2015.rrj.33.040301

• RADIATION CHEMISTRY • Previous Articles     Next Articles

Study on UV radiation on high temperature vulcanization silicone rubber composite insulators

LI Guofang1  YU Lan1  QIN Yongxiong1  YANG Xijie2  SONG Shijin1  ZHANG Shangang3  FAN Kun1  DONG Kun1   

  1. 1(Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China)
    2(Institute of architectural engineering, Kunming University of Science and Technology, Kunming 650093, China)
    3(Nanjing electric (group) co. LTD, Nanjing 210046, China)
  • Received:2015-02-06 Revised:2015-03-05 Online:2015-08-20 Published:2015-06-12

Abstract:

The self-designed adjustable ultraviolet aging experimental box was used for the accelerated aging experiments (0–1000 h) of HTV silicone rubber from two factories, A and B, with the radiation wavelength ranging from 320–750 nm. The tensile test, hardness test, and the measurements of volume resistivity, surface resistivity, disruptive strength, and hydrophobicity were used to evaluate the mechanical and electrical properties of HTV silicone rubber and its change mechanism is further investigated by Fourier transform infrared spectroscopy (FTIR). The results showed that tensile strength of sample A and B dropped from 6.4 MPa to 4.6 Mpa, and from 5.1 MPa to 4.6 MPa, accounting for 28% and 9% respectively; their longation at break dropped from 156% to 76%, and from 247% to 148%, accounting for 51.3% and 40.1% separately; hardness increased 1−2 degrees. In addition, volume and surface resistivity and disruptive strength suffered a drop of various degrees, and hydrophobicity decreased by 1−2 degrees level. After ultraviolet radiation, the mechanical properties and electrical properties of A and B samples are reduced.

Key words: High temperature vulcanization silicone rubber, Ultraviolet aging, Mechanical properties, Electrical properties, Infrared spectroscopy

CLC Number: 

  • TM8,TM215.2,TL13