"Effect of two-phase crosslinking network of chloroprene rubber/ethylene-propylene-diene rubber blend on its storage modulus and stress relaxation property"

Abstract

The relationship between crosslinking density and storage modulus of chloroprene rubber (CR) / ethylene-propylene-diene rubber (EPDM) blend was studied and the fitting model was established. The relationship between the crosslinking density, storage modulus and stress relaxation properties of each component in the blended rubber was also investigated. The results showed that the applicable temperature range of the model was 35-80 ℃ and the crosslinking density of the two phases were linearly related to the storage modulus. When m(CR)/m(EPDM) was 70/30, the predicted value of the storage modulus model of CR/EPDM blend was close to the measured value, which proved that the model had high reliability. The effect of CR phase on the total storage modulus of CR/EPDM blend was greater. The stress relaxation property of the blend had a linear relationship with the crosslinking density and storage modulus of each component.

Keywords

• chloroprene rubber
• ethylene-propylene-diene rubber
• blend
• fitting model
• crosslinking density
• storage modulus
• stress relaxation property
• performance prediction