Activation parameters associated with the β relaxation of poly(cyclohexyl acrylate) |
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Authors: | Ricardo Dí az-Calleja,Evaristo Riande,Julio San Rom n |
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Affiliation: | Ricardo Díaz-Calleja,Evaristo Riande,Julio San Román |
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Abstract: | The interpretation of the mechanical and dielectric β relaxations of poly(cyclohexyl acrylate) by the coupling scheme suggests that the dielectric relaxation process is more complex than the mechanical one, contrary to what occurs in the glass–rubber relaxation. The distribution of activation energies for the dielectric process, obtained from isochronal and isothermal loss curves, increases with temperature and frequencies. The determination of the distribution of the activation-free energy indicates a distribution of the activation entropy for both the mechanical and dielectric β process, suggesting that a distribution of preexponential factors in the Arrhenius equation also exists. © 1992 John Wiley & Sons, Inc. |
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Keywords: | poly(cyclohexyl acrylate), activation energy for β relaxations of mechanical and dielectric β relaxations of poly(cyclohexyl acrylate) activation energy of β relaxations of poly(cyclohexyl acrylate) |
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