The ozone resistance, phase structure, and the structure of interphase transition layers in vulcanized blends of butadiene-acrylonitrile rubbers (NBR) with poly(vinyl chloride) (PVC) was studied by measuring mechanical stress relaxation in an inert and ozone-containing atmosphere and EPR. The samples were prepared from NBR of the SKN-18, SKN-26, and SKN-40 grades and PVC (obtained by emulsion or suspension polymerization) by methods of high- and low-temperature blending followed by treatment in a thermostat. A mechanism of the ozone-protective action of thermoplast (PVC) in the blends with NBR is considered for the systems possessing various degrees of homogeneity.
acrylonitrile-butadiene rubbers, ozone-induced degradation, ozone-protective action, compatibility, phase, structure, interphase layers, stress relaxation, electron paramagnetic resonance, the rotational mobility (correlation time τ c), бутадиен-нитрильный каучуки, деструкция под действием озона, озонозащитное действие, совместимость, фаза, структура, межфазные слои, релаксация напряжений, электронный парамагнитый резонанс, вращательная подвижность (время корреляции τ c)
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