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Glass is far inferior to paper, plastic and Styrofoam in terms of insulation. Thermal conductivity in terms of BTU/(feet - hour - degrees F) is 1.82 for glass, 0.09 for paper, 0.06 for Styrofoam. The conductivity of plastics varies depending on the materials: for polypropylene and polycarbonate, the thermal conductivity values are 0.69 and 0.35, respectively.
In physics, thermal conductivity (often denoted k, Î», or Îº) is the property of a material to conduct heat. It is evaluated primarily in terms of Fourier's Law for heat conduction.n SI units, thermal conductivity is measured in watts per meter kelvin (W /(m Â· K)). The dimension of thermal conductivity is M 1 L 1 T â3 Î¸ â1. These variables are (M)mass, (L)length, (T)time, and (Î¸)temperature. In Imperial units, thermal conductivity is measured in BTU /(hr Â· ft â Â°F).