Abstract
Previous measurements on an ethylene-vinylacetate copolymer are discussed anew in the framework of new concepts for the glass transition. The response signals (n.m.r., ultrasonics, dielectric polarization, torsion, and specific heat) are presented in a logarithm of frequency-temperature diagram. An arrangement of the response signals across the glass transition zone similar to that in other polymers was found. The absorption maximum temperature of ultrasonics and the temperature where the super-Lorentzian shape distinctively appears in the wl-n.m.r. spectra are located at the high frequency limitb of the glass transition zone corresponding to short-range correlated molecular motions.
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Sobottka, J., Donth, E. Limits of the dynamic glass transition zone in an ethylene-vinylacetate copolymer. Colloid & Polymer Sci 261, 652–655 (1983). https://doi.org/10.1007/BF01415035
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DOI: https://doi.org/10.1007/BF01415035