Journal of Thermal Analysis and Calorimetry
Volume/Issue:
Volume 38: Issue 5
Effect of pressure on the thermal conductivity of polymers
Authors:
V. P. Privalko Institute of Macromolecular Chemistry Academy of Sciences of The Ukrainie 252160 Kiev The Ukraine

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N. A. Rekhteta Institute of Macromolecular Chemistry Academy of Sciences of The Ukrainie 252160 Kiev The Ukraine

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Pages:
1083–1102
Online Publication Date:
02 Aug 2005
Publication Date:
01 May 1992
Article Category:
Research Article
DOI:
https://doi.org/10.1007/bf01979171
Keywords:
polymers; thermal conductivity
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The thermal conductivity of polyolefins and halogen-substituted polymers was studied in a broad temperature interval spanning both solid and melt states, in the range of pressures from 0.1 up to 100 MPa with the aid of a high-pressureλ-calorimeter in the continuous heating regime. Treatment of data on the pressure dependence of the thermal conductivity of melts in terms of Barker's equation yielded the values of ‘quasilattice’ Grueneisen parameter γB which exhibited the same dependence on molecular structure of a polymer as the parameter 3C/p from the Simha-Somcynsky equation of state (number of external degress of freedom per chain repeat unit). Analysis of the dependence of the thermal conductivity of polyethylene on the degree of crystallinity revealed the inadequacy of the current two-phase model which does not account for the microheterogeneity of the ‘amorphous phase’. It was concluded that interchain heat transfer makes the dominant contribution to the thermal conductivity of polymers both in amorphous and in crystalline states.

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Cover Journal of Thermal Analysis and Calorimetry
Journal of Thermal Analysis and Calorimetry
Print ISSN:
1388-6150
Online ISSN:
1572-8943

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Journal of Thermal Analysis and Calorimetry
Language English
Size A4
Year of
Foundation		 1969
Volumes
per Year		 1
Issues
per Year		 24
Founder Akadémiai Kiadó
Founder's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
Publisher Akadémiai Kiadó
Springer Nature Switzerland AG
Publisher's
Address		 H-1117 Budapest, Hungary 1516 Budapest, PO Box 245.
CH-6330 Cham, Switzerland Gewerbestrasse 11.
Responsible
Publisher		 Chief Executive Officer, Akadémiai Kiadó
ISSN 1388-6150 (Print)
ISSN 1588-2926 (Online)

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