Slow Debye-type peak observed in the dielectric response of polyalcohols
نویسندگان
چکیده
منابع مشابه
The slow dielectric Debye relaxation of monoalcohols in confined geometries.
Broadband dielectric relaxation measurements have been performed on monoalcohols confined in the quasi-two-dimensional space between clay platelets and the quasi-one-dimensional pores of approximately 10 Å diameter in a molecular sieve. Interestingly, the results show that the slow Debye-like process is present even in these severe confinements, proving that structural models that are based on ...
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چکیده ندارد.
On the low frequency loss peak in the dielectric spectrum of glycerol.
We measured dielectric spectra of glycerol at pressures exceeding 1 GPa in order to examine the slow Debye-like peak. This peak is not a relaxation process, but its frequency is consistent with an origin in dielectric discontinuities due to impurities. These heterogeneities have a non-negligible bulk modulus and are identified as volatile, relatively non-polar liquid contaminants. Although this...
متن کاملCritical behavior of three organosiloxane de Vries-type liquid crystals observed via the dielectric response.
Dielectric measurements have been made on three organosiloxane liquid crystal compounds exhibiting a smectic A (SmA) to smectic C* (SmC*) transition, the SmA phase being of the de Vries type. The electroclinic response of the molecules in the de Vries phase of these compounds exhibits a double-peak profile, and is thus different from the conventional chiral SmA phase, a feature explained on the...
متن کاملProbing the Debye Dielectric Relaxation in Supercooled Methanol
The explanation of the dielectric dynamics in methanol would offer knowledge of the Debye relaxation in supercooled monoalcohols. However, due to the fast crystallization, it is hard to attain the dynamics of pure methanol in the deeply supercooled region. In this paper, we studied the dynamics of methanol – 2-ethyl-1-hexanol mixtures with methanol concentration up to 80 mol% using dielectric a...
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ژورنال
عنوان ژورنال: The Journal of Chemical Physics
سال: 2010
ISSN: 0021-9606,1089-7690
DOI: 10.1063/1.3294703