Category: Transient Plane Source
Keywords: Bulk Density, Compressive Strength, Helium Pycnometry, Polymeric Foams, Scanning Electron Microscope, Scanning electron microscope (SEM), SEM, Skeletal Density, Thermal Conductivity, thermal insulation, transient plane source method
Abstract: Polymeric tannin/furanic foams fortified with polyurethane (PUR) and 4,4’ diphenylmethane diisocyanate (pMDI) were prepared. The thermo-physical and mechanical properties of the produced foams were investigated experimentally. It was found that since there were a number of active isocyanate groups on the PUR that was used, there was no difference in adding PUR or pMDI to the foams, and so only the results for pMDI were presented. It was found that the density of the foams increased with the increasing weight fraction of pMDI. The thermal conductivity also increased slightly with increasing pMDI content; however, it did not increase by enough to limit its applications as thermal insulation. The mechanical properties of the produced foams were found to be greatly improved over those of pure tannin/furanic foams. It was concluded that foams fortified with pMDI or PUR would be a good material for use as a thermal insulator.
Reference: Maderas. Ciencia y tecnologia, 14, 3 (2012) 257-265