Journal article

Thermal conductivity of polymethyl methacrylate (PMMA) and borosilicate crown glass BK7

Assael M, Botsios S, Gialou K, Metaxa I ...see all

International Journal of Thermophysics, vol. 26, issue 5 (2005) pp. 1595-1605

  • 62


    Mendeley users who have this article in their library.
  • 51


    Citations of this article.
Sign in to save reference


The thermal conductivity of polymethyl methacrylate (PMMA) and borosilicate crown glass BK7 has been studied. The transient hot-wire technique has been employed, and measurements cover a temperature range from room temperature up to 350 K for PMMA and up to 500 K for BK7. The technique is applied here in a novel way that minimizes all remaining thermal-contact resistances. This allows the apparatus to operate in an absolute way and with very low uncertainty. The method makes use of a soft silicone paste material between the hot wires and the solid under test. Measurements of the transient temperature rise of the wires in response to an electrical heating step over a period of 20 μs up to 5 s allow an absolute determination of the thermal conductivity of the solid, as well as of the silicone paste. The method is based on a full theoretical model with equations solved by a two-dimensional finite-element method applied to the exact geometry. At the 95% confidence level, the standard deviations of the thermal conductivity measurements are 0.09% for PMMA and 0.16% for BK7, whereas the standard uncertainty of the technique is less than 1.5%. © 2005 Springer Science+Business Media, Inc.

Author-supplied keywords

  • BK7
  • Borosilicate crown glass
  • PMMA
  • Polymethyl methacrylate
  • Thermal conductivity
  • Transient hot wire

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free