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Träfflista för sökning "L773:1542 9385 OR L773:0098 1273 "

Search: L773:1542 9385 OR L773:0098 1273

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1.
  • Andersson, Per, et al. (author)
  • Pressure dependence of the thermal conductivity, thermal diffusivity, and specific heat of some polymers
  • 1975
  • In: Journal of Polymer Science Polymer Physics Edition. - : Wiley. - 1542-9385 .- 0098-1273. ; 13:2, s. 243-251
  • Journal article (peer-reviewed)abstract
    • The pressure dependence of the specific heat of poly(methyl methacrylate), polystyrene, and atactic and isotactic polypropylene was determined from simultaneous measurements of thermal conductivity and diffusivity in a cylindrical geometry at 300°K and in the pressure range 0-37 kbar. The thermal conductivity and the diffusivity both increase strongly with pressure, while the specific heat decreases. The pressure dependencies are most pronounced at low pressures. The results are compared with other experimental results and with theoretical calculations.
  •  
2.
  • Sandberg, Olov, et al. (author)
  • Thermal conductivity and heat capacity of liquid and glassy poly(vinyl acetate) under pressure
  • 1980
  • In: Journal of Polymer Science. - : John Wiley & Sons. - 2642-4150 .- 2642-4169. ; 18:10, s. 2123-2133
  • Journal article (peer-reviewed)abstract
    • The dependence of thermal conductivity λ and heat capacity per unit volume pcp on temperature and pressure for poly(vinyl acetate) has been measured by a transient hot-wire probe technique. The measurements were made under pressures up to 0.5 GPa over a temperature range of 270–470 K. The temperature coefficient of thermal conductivity (∂ lnλ/∂T)p was found to increase with pressure for both the liquid and the glassy state. The change in heat capacity per unit volume in the region of the glass-transition temperature was found to decrease with increasing pressure. The Ehrenfest relation does not explain the variation of the pressure coefficient of the glass-transition temperature.
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  • Result 1-2 of 2
Type of publication
journal article (2)
Type of content
peer-reviewed (2)
Author/Editor
Andersson, Per (1)
Sundqvist, Bertil (1)
Bäckström, Gunnar (1)
Sandberg, Olov (1)
University
Umeå University (2)
Language
English (2)
Research subject (UKÄ/SCB)
Natural sciences (2)

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