The thermal conductivity and specific heat of seven different polyurethane foams and their melts were investigated using the Transient Plane Source. The thermal conductivity of the foams themselves ranged between 0.048 and 0.050 W/mK, while the thermal conductivity of the melt product was 0.186 to 0.200 W/mK, a difference of 300%. Melting had the opposite effect on the specific heat of the samples, which dropped 20% from a range of 2359 to 2996 J/kgK to 1958 ...
Low-density microcellular non-isocyanate polyurethane (NIPU) foams were prepared using biological compounds and carbon dioxide. The morphology of these foams was investigated by scanning electron microscopy (SEM), and the thermal conductivity was determined using the transient plane source (TPS) method. It was concluded that a study needed to be undertaken to determine how to fine tune the morphology of the foams in order to decrease the thermal conductivity of the foams....
The authors describe a synthesis method for a series of pulverized expandable graphite (pEG)/melamine-formaldehyde (MF) resin core-shell structure particles. The particles are also added into rigid polyurethane foams (RPUF) to characterize the flame-retardant, mechanical, and thermal insulation properties of the RPUF/pEG-MF composites. It was found that the pEG/MF particles showed good flame-retardant performance in the composites by providing a physical barrier effect....
