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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.
Thermal conductivity 2. Definitions The reciprocal of thermal conductivity is thermal resistivity, usually measured in kelvin-meters per watt (KÂ·mÂ·W â1).When dealing with a known amount of material, its thermal conductance and the reciprocal property, thermalresistance, can be described.