Dielectric relaxation in hydroxyethyl cellulose

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26220%2F00%3A42200004" target="_blank" >RIV/00216305:26220/00:42200004 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26520/00:62200011
Result on the web
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DOI - Digital Object Identifier
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Result language
angličtina
Original language name
Dielectric relaxation in hydroxyethyl cellulose
Original language description
This paper presents the results of the dielectric analysis of hydroxyethyl cellulose (HEC) in the temperature range 100-350 K and in the frequency range 20 Hz - 1 MHz. The results show a distinct broad relaxation process in the temperature range 150-250Kwith activation energy of about 33.4 MJ/kmol. The strength of the relaxation encrease only slightly with tmeperature and the apparent increase of the height of the relaxation maximum is attributed to an increase of the co-operativity parameter. This increase is interpreted as decrease of the co-operativity of dipole motions with increasing temperature. The origin of relaxation is ascribed to the reorientation of double ethylene oxide groups or part of these.
Czech name
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Czech description
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Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
BO - Biophysics
OECD FORD branch
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Project
<a href="/en/project/VS96108" target="_blank" >VS96108: Modeling of polymer processing</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2000
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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