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- Andersson, PerUmeå universitet,Institutionen för fysik (author)
Pressure dependence of the thermal conductivity, thermal diffusivity, and specific heat of polyethylene
- Article/chapterEnglish1973
Publisher, publication year, extent ...
- American Institute of Physics (AIP),1973
- printrdacarrier
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- LIBRIS-ID:oai:DiVA.org:umu-221611
- https://urn.kb.se/resolve?urn=urn:nbn:se:umu:diva-221611URI
- https://doi.org/10.1063/1.1662620DOI
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- Language:English
- Summary in:English
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- The pressure dependence of the specific heat of high‐density polyethylene was determined from simultaneous measurements of thermal conductivity and diffusivity in a cylindrical geometry at 300 K and in the pressure range 0–25 kbar. The thermal conductivity and the diffusivity both increase strongly with pressure, the values at 25 kbar being higher by factors of 2.75 and 2.77, respectively, than those at atmospheric pressure. The specific heat decreases, most strongly so at low pressures, and its value at 25 kbar is 0.80 times that at atmospheric pressure. The thermal conductivity of low‐density polyethylene was determined as a function of pressure. Its value at 25 kbar was found to be 2.19 times that at atmospheric pressure. The difference in conductivity response to pressure between the two varieties is given a simple theoretical interpretation.
Subject headings and genre
- NATURVETENSKAP Fysik Den kondenserade materiens fysik hsv//swe
- NATURAL SCIENCES Physical Sciences Condensed Matter Physics hsv//eng
- High pressure
- thermal conductivity
- thermal diffusivity
- specific heat capacity
- high density polyethylene
- low density polyethylene
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- Bäckström, GunnarUmeå universitet,Institutionen för fysik(Swepub:umu)guba0007 (author)
- Umeå universitetInstitutionen för fysik (creator_code:org_t)
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- In:Journal of Applied Physics: American Institute of Physics (AIP)44:6, s. 2601-26050021-89791089-7550
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