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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.
Sponsored Links. Thermal conductivity is the quantity of heat transmitted thr ough a unit thickness in a direction normal to a surface. of unit area, due to a unit temperature gradient under steady state conditions. Thermal conductivity of some common materials and products are indicated in the table below. â¢ 1 W/(m.K) = 1 W/(m. oC) = 0.85984 kcal/(hr.m. C) = 0.5779 Btu/(ft.hr. F) Thermal Conductivity - k - W/(m.K) Material/Substance Temperature - oC 25 125 225 Acetone 0.16 Acetylene (gas) 0.018 Acrylic 0.2 Air, athmosphere (gas) 0.024 Alcohol 0.17 Aluminum 250 255 250