Standard Reference Materials: SRM 1453, Expanded Polystyrene Board, for Thermal Conductivity from 281 K to 313 K

Published

December 21, 2012

Author(s)

Robert R. Zarr, Adam L. Pintar

Abstract

Thermal conductivity measurements at and near room temperature are presented as the basis for certified values of thermal conductivity 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 the NIST 1016 mm line-heat-source guarded hot plate apparatus. The thermal conductivity measurements were conducted over a range of bulk density from 37.4 kg/m3 to 45.8 kg/m3 and mean temperature from 281 K to 313 K. Uncertainties of the measure- ments, consistent with current ISO guidelines, have been prepared. 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 surface roughness, microstructure, and compressive resistance, are presented. Each unit of SRM 1453 is batch certified for thermal conductivity with the following equation: where λ is the predicted thermal conductivity (W∙m-1∙K-1), ρ is the bulk density (kg∙m-3) and, Tm is the mean temperature (K) valid over the temperature range of 281 K to 313 K. The expanded uncertainty for λ is 1.5 % with a coverage factor of approximately k = 2.

Citation

Special Publication (NIST SP) - 260-175

Report Number

260-175

NIST Pub Series

Special Publication (NIST SP)

Pub Type

NIST Pubs

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DOI Link

Keywords

calibration, bulk density, expanded polystyrene board, fenestration, guarded-hot-plate apparatus, heat-flow-meter apparatus, standard reference material, SRM 1453, thermal conductivity, thermal insulation, uncertainty

Citation

Zarr, R. and Pintar, A. (2012), Standard Reference Materials: SRM 1453, Expanded Polystyrene Board, for Thermal Conductivity from 281 K to 313 K, Special Publication (NIST SP), National Institute of Standards and Technology, Gaithersburg, MD, [online], https://doi.org/10.6028/NIST.SP.260-175 (Accessed April 19, 2024)