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


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.


Polymer Silicone Rubber Phase Separation Material Processing 
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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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