Accession Number:

AD0646539

Title:

WATER STABILITY OF FILLED ELASTOMERS,

Descriptive Note:

Corporate Author:

SUMITOMO ELECTRIC INDUSTRIES LTD OSAKA (JAPAN)

Personal Author(s):

Report Date:

1966-12-09

Pagination or Media Count:

10.0

Abstract:

The effects of water on the electrical properties of filled elastomers were studied. The rate of decrease of insulating resistance of butyl rubber cured with quinondioxime is not directly related with the amount of apparent water absorbed but depends on the amount and kind of filler used, and it is in inverse proportion to the square of thickness below 80C but it is not related with thickness over 120C. After these experiments, the theoretical treatment of the effect of the amount of absorbed water and diffusion coefficient on electrical resistivity was carried out. Regards the relation between moisture absorption and the dissipation factors of several kinds of rubber it was found that peroxide-cured EPDM filled with talc showed the peak value of dissipation factor at the first stage of moisture absorption. This is a reversible phenomenon. The frequency dependency on the dissipation factors of samples absorbing moisture, was measured. Author

Subject Categories:

  • Electrical and Electronic Equipment
  • Elastomers and Rubber

Distribution Statement:

APPROVED FOR PUBLIC RELEASE