engleski

The role of molar volume of the organic solvents in the swelling system EPDM vulcanizate/solvent

Eight samples of poly(ethylene-co-propylene-co-diene)(EPDM, containing 55 wt.-% ethylene) were vulcanized with 0, 5-8, 0 phr dicumyl peroxide. The influence of molar volumes V1 of cyclohexane, hexane, heptane, iso-octane, tetrachloromethane, carbon disulfide, xylene, benzene, toluene, tetrahydrofuran, trichloromethane and chlorobenzene on the swelling intensity of the EPDM vulcanizates was studied, and it was found that regardless of the solubility parameters, polarity, dielectric constants, acidity or basicity of solvents, a linear relationship exists between V1 and number of moles of solvent in the gels, n1. With increase of V1, n1 decreases.

dicumyl peroxide ; EPDM ; molar volume ; solvents ; swelling ; vulcanizates

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