Summary
Detailed viscoelastic measurements of natural and ethylene-propylene rubbers cross-linked by sulphur and dicumyl peroxide to various degrees were performed. Main attention is devoted to lightly cross-linked systems where two relaxation processes occur near above the glass transition temperature. The two peaks of the relaxation spectra corresponding to these two relaxation processes begin to overlap as the cross-linking density increases. The simple structural interpretation of the observed features using the entanglement concept is given.
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Havránek, A. Mobility of rubber chains near above the glass transition temperature. Polymer Bulletin 8, 133–139 (1982). https://doi.org/10.1007/BF00263019
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DOI: https://doi.org/10.1007/BF00263019