Abstract
A procedure for the quantitative characterization of complex stressed states and their effect on the relaxation properties of polymer materials has been proposed. Throughout the temperature interval where the thermal degradation of polymers can be ignored, three measurements runs for recording internal friction spectra Δ(T) are performed. As has been shown for cellulose diacetate and poly(vinylformals), a difference between attenuation decrements Δ1(T)–Δ2(T) for the initial samples and the same samples in the second measurement cycle reflects the presence of cryptoheterogeneity. This difference achieves its maximum values at temperatures close to the glass transition temperature T α but becomes noticeable even at temperatures several tens of degrees lower than T α.
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Original Russian Text © N.Yu. Lomovskaya, A.G. Barteneva, N.A. Abaturova, 2006, published in Vysokomolekulyarnye Soedineniya, Ser. A, 2006, Vol. 48, No. 11, pp. 1985–1989.
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Lomovskaya, N.Y., Barteneva, A.G. & Abaturova, N.A. Internal friction spectra of polymer materials in complex stressed states. Polym. Sci. Ser. A 48, 1171–1175 (2006). https://doi.org/10.1134/S0965545X0611006X
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DOI: https://doi.org/10.1134/S0965545X0611006X