The effects of compatibility on the mechanical properties and fatigue resistance of butyl/EPDM rubber blends

Abstract

In this study, compatibility of butyl/ethylene‐propylene‐diene rubbers in different ratios was investigated byviscometric technique. For evaluating polymer compatibility, the parameters Δb suggested by Krigbaum&Wall, ΔB and μ that were suggested by Chee were calculated. Data obtained from viscometric study were used for preparing new compound recipe. Mechanical and rheological properties of the new compounds were measured and the changes in the properties before and after thermal aging were determined. Replacement of ethylene‐propylene‐diene rubber with butyl rubber in appropriate ratio improved the fatigue resistance of the vulcanizates. Improvement of dynamic mechanical properties of polymer blends is expected only in the case of blending compatible polymers in appropriate ratios. The compatibility of blends in different ratios has been studied by viscometric technique and mechanical measurements and obtained very similar results. It has been concluded that viscometric determination of butyl/ethylene‐propylene‐diene rubbers compatibility could be used as a simple technique for predicting the mechanical properties of the same rubber blend that was related with solid phase compatibility. POLYM. COMPOS., 31:1869–1873, 2010. © 2010 Society of Plastics Engineers.

Effects of Electron Beam Irradiation on the Mechanical, Thermal, and Surface Properties of Some EPDM/Butyl Rubber Composites

“…Due to the absence of double bonds in the backbone, butyl rubber is stable in diluted solutions of acids or alkalies, as well as to prolonged heat exposure. Also, butyl rubber, due to its excellent properties, has found applications as materials utilized in high-pressure conditions and to damp shocks and vibrations [5,7]. The specific working range for products based on butyl rubber is from −50 to 120 °C.…”

The mechanical properties of damping rubber reinforced by Wrap Knitted Spacer Fabric

“…The precipitant was washed three times with acetone to remove the unreacted MAH monomer and then exposed to vacuum at 60°C for 72 hr. In addition, a commercial compatibilizer (ethylene propylene diene monomer)‐ grafted –(maleic anhydride) (EPDM‐ g ‐MAH), which was supplied by Dupont (N416) and mostly used as the flexibilizer of nylon, was also applied in this study because many researchers have found that EPDM was compatible with CIIR at low content . (For the details of CIIR‐ g ‐MAH and EPDM‐ g ‐MAH, please refer to Supporting Information.…”

Influence of blend composition and organic cloisite 15A content in the structure of isobutylene–isoprene rubber/ethylene propylene diene monomer composites for investigation of morphology and mechanical properties

“…2 IIR/EPDM blends have the properties of immiscible rubbers together such as hydrocarbon and oil resistance, ozone, optical, heat and oxygen resistance and good processability which cause many successful applications in different industries, and investigations of the effect of composition ratio on curing characteristics, morphology and mechanical properties of IIR/EPDM blends are noteworthy topics. 12–15 Currently, researchers are focusing on IIR/nanoclay nanocomposites 7,8 and EPDM/nanoclay nanocomposites 9–11 separately. As mentioned above, IIR has a limited resistance to thermal aging.…”