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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.
The conduction of heat in the solid PU structure is a combination of the heat flow in the. cell walls and the struts. The thermal conductivity (Î»PU) of the solid PU polymer from. crushed foam samples is reported to be 0,26 WÂ·m-1Â·K-1 [6] and the fraction of solids in. the struts (fs) has been reported to 0,8 [7].