Foam properties thermophysical

Table 23 shows the thermophysical properties of some syntactic foams 2). Polyimide syntactic foams have a thermal expansivity of 20 xio-6 deg-1 and thermal conductivities of 0.085 W/mK at 22 °C and 0.111 W/mK at 370 °C 10S-106). The low thermal conductivity of the carbonized foams (Fig. 17) is due to their open pore structure113). 

The thermophysical properties of a foam heat capacity and thermal conductivity, depend on the total liquid content and its distribution in the foam. The bubbles shape and distribution of liquid between borders, films and vertexes also affect thermal conductivity. By definition the bulk heat capacity CV (at p - const) equals... 

The volximetric weight, a parameter characteristic for the relative contents of both the solid and gas phase in a material, is the fundamental morphological parameter of foamed polymers and is related to all relevant physical properties of foamed plastics such as strength, thermophysical and electric properties. 

This compilation is a voluminous work intended to provide current design information in thermal insulation materials and assemblies for building envelopes and mechanical systems. Compiled data includes thermophysical properties of conunonly used generic thermal-insulating materials and their application in wall, floor and roof assemblies, door and window assemblies and in mechanical piping, tanks, vessels, equipment, and air-duct installations. Listings of insulation materials are sorted by both manufacturers trade names and by product descriptions. Covers all kinds of insulating materials, not only foams. 

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