Thermal conductivity and thermal expansion behavior of glass fiber‐reinforced rigid polyurethane foam

Abstract The thermal conductivities and the thermal expansion curves of glass fiber‐reinforced rigid polyurethane foams with various fiber lengths, various fiber volume fractions and various matrix densities were determined experimentally. Additionally the thermal expansion coefficients of these materials at room temperature were examined in terms of the interaction between fiber and matrix. The thermal expansion properties were analyzed successfully with the analogous treatment which is applied to the mechanical tensile behavior.