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Room-Temperature Thermal Conductivity of Expanded Polystyrene Board for a Standard Reference Material.


pdf icon Room-Temperature Thermal Conductivity of Expanded Polystyrene Board for a Standard Reference Material. (2487 K)
Zarr, R. R.; Davis, M. W.; Anderson, E. H.

NISTIR 5838; 42 p. May 1996.

Available from:

National Technical Information Service
Order number: PB96-193639

Keywords:

expanded polystyrene; thermal conductivity; calibration; fenestration; foam; guarded hot plate; standard reference materials; experimental design

Abstract:

Thermal conductivity measurements at room temperature are presented as the basis for certified values of SRM 1453, expanded polystyrene board. The measurements have been conducted in accordance with a randomized full factorial experimental design with two variables, bulk density and temperature, using NISTs one-meter line-heat-source guarded hot plate apparatus. Uncertanities of the measurements, consistent with current ISO guidelines, have been prepared. The thermal conductivity measurements were conducted over a range of bulk density of 37.4 to 45.8 kg/m3 and mean temperature of 281 to 313 K. Statistical analyses of the physical properties of the SRM are presented and include variations between boards, as well as within boards. Measurements of the foam's compressive properties and microstructure are presented.