Abstract
Spectra of relaxation times have been constructed for a fabric-filled and a cord-filled phenolic of commercial type by combining the results of torsion tests on cylindrical specimens over a relatively wide range of strain rates and temperatures. The resulting spectra are not unimodal and extend over thirty to forty orders of magnitude.
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Albrecht, B., Freudenthal, A.M. On relaxation spectra in hard polymers. Rheol Acta 1, 431–445 (1961). https://doi.org/10.1007/BF01989088
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DOI: https://doi.org/10.1007/BF01989088