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Journal of Materials Science

, Volume 29, Issue 9, pp 2431–2435 | Cite as

Morphology and ageing behaviour of silicone-EPDM blends

  • S. Kole
  • D. K. Tripathy
Papers

Abstract

The silicone-EPDM system has been studied with blend ratios (silicons:EPDM) of 50∶50, 40∶60 and 30∶70. The first set of blends was prepared by roll-mixing of the elastomers and curative whereas in the second set, DCP-cured powder of EPDM, prepared in a Brabender plasticorder, was mixed with silicone rubber and DCP in a roll mill. A comparison of blends show that the second set exhibits inferior properties as compared to the first set. Specimens were also aged at 150 and 175 °C for various periods. The physical properties of the aged specimens show a reversal in trend, i.e. the second set of specimens shows better physical properties on ageing. The strengthening of the silicone phase by use of a different curative (Perkadox 14/40) in the 50∶50 blend of the second set shows a beneficial action on ageing. Morphology studies with SEM confirm the two-phase structure for both sets of blends. In both cases phase separation occurs with ageing, but the continuous phase for the second set of blends maintains its continuity for a higher period than the corresponding specimens of the first set.

Keywords

Polymer Silicone Rubber Phase Separation Material Processing 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Chapman & Hall 1994

Authors and Affiliations

  • S. Kole
    • 1
  • D. K. Tripathy
    • 1
  1. 1.Rubber Technology CentreIndian Institute of TechnologyKharagpurIndia

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