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Elastic and viscoelastic behavior of ethylene–propylene copolymers

1973; Wiley; Volume: 17; Issue: 11 Linguagem: Inglês

10.1002/app.1973.070171101

1097-4628

F. De Candia, Vittoria Vittoria,

Adsorption, diffusion, and thermodynamic properties of materials

Abstract The viscoelastic behavior of an ethylene–propylene copolymer is analyzed. Two different vulcanization procedures were followed; in the first a binary mixture of initiator‐polymer was used, while in the second the polymer was diluted by a solvent. The networks thus obtained show a different viscoelastic behavior depending on the different vulcanization procedure used. Results, analyzed in terms of supramolecular organization being present in the amorphous material, give some important information about the molecular nature of the C 2 coefficient of the Mooney‐Rivlin equation, and therefore about the well‐known deviations from the Gaussian theory shown by all rubber‐like networks.