Influence of Propylene Units Stereoregularity in Modified Ethylene-Propylene-Diene Elastomers on the Ozone Resistance of Covulcanizates with Acrylonitrile-butadiene Rubbers

2017;
: pp. 35 – 43
Автори: 
Nadezhda Livanova, Anatoliy Popov, Vladimir Shershnev and Gennady Zaikov

Nadezhda Livanova-1, Anatoliy Popov-1,2, Vladimir Shershnev-3 and Gennady Zaikov-1

  1. Emanuel Institute of Biochemical Physics, Russian Academy of Sciences, 4, Kosygina St., 119991 Moscow, Russia; livanova@sky.chph.ras.ru
  2. Plekhanov Russian University of Economics,36, Stremyanny Ln., 117997 Moscow, Russia
  3. Lomonosov State Academy of Fine Chemical Technology, 86, Vernadskogo Ave., 11957 Moscow, Russia

The modification of ethylene–propylene–diene elastomers via the addition of fragments of an accelerating agent to improve their compatibility with acrylonitrile-butadiene rubbers and to reduce the rate of ozone degradation of the polydiene matrix is efficient only in the case of low stereoregularity of propylene units in the ethylene–propylene–diene copolymers when the crosslinking system is added to acrylonitrile-butadiene rubber. When the isotacticity of propylene fragments in the chains of ethylene–propylene–diene elastomers is high, their modification leads to a reduction in the ozone resistance of the crosslinked blend independently of the mode of introduction of the crosslinking system.

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