Temperature Dependence of Thermophysical Properties of Untreated Glass Oil-Palm-Fibre Reinforced Phenolformaldehyde Composites

摘要

Thermophysical properties such as, effective thermal conductivity (λ_e) and effective thermal diffusivity (χ_e) of untreated reinforced phenolformaldehyde with different weight per centages of oil-palm-fibre (x) are measured simultaneously using the transient plane source (TPS) technique between 80 to 120℃. The composites investigated contain 20, 30 and 50 weight per centage of oil-palm-fibre. The experimental results at different weighted composites show that there is variation in λ_e and 謃e in this temperature range. However, a maximum value of λ_e and χ_e is observed at 100℃, which lies in the vicinity of glass transition temperature (T_g) of these composites. Efforts are also made to predict the weight per centage of oil-palm-fibre (OPF) and temperature dependence of λ_e and χ_e through the development of an empirical model. Theoretical predicted values of λ_e and χ_e for these composites are in agreement with experimental results over the entire range of temperature for investigations