Abstract
Advance was made recently in identifying the nature of the Debye relaxation observed by dielectric spectroscopy in monohydroxy alcohols by other experimental techniques. Consistent with the experimental findings, the transient chain model give a good description of the origin of the Debye relaxation. Notwithstanding, a general property of the Debye relaxation remains not explained, and that is the weaker temperature and pressure dependences of its relaxation time τD(T,P) compared to τα(T,P) of the faster structural α-relaxation at temperatures approaching the glass transition temperature Tg. Based on the transient chain model for the Debye relaxation, and the Coupling Model for the α-relaxation, we have explained the difference in the temperature and pressure dependences of τD(T,P) compared to τα(T,P) quantitatively.
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