Title of article :
Effects of biopitch on the properties of flexible polyurethane foams
Author/Authors :
Renata Costa Silva Ara?jo، نويسنده , , Vânya M?rcia Duarte Pasa، نويسنده , , Breno Nonato Melo، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2005
Abstract :
Biopitches are industrial residues obtained by the distillation of the tar recovered during Eucalyptus charcoal production and can be used as a renewable polyol source. Flexible polyurethane foams were prepared with different proportions of biopitch and HTPB (hydroxyl-terminated polybutadiene) and using polymeric MDI (4,4′ diphenyl methane diisocyanate), N,N dimethylcyclohexylamine as a catalyst and water as a blowing agent. Elemental analysis, thermal analysis (TG/DSC), Fourier Transform Infrared Spectroscopy (FTIR), scanning electronic microscopy (SEM), and density results were used aiming to discuss the contribution of biopitch to foams properties. The higher the biopitch content, the higher the thermal stability and the lower the density of the flexible foams (air atmosphere), behaviors similar to those of lignin-based polyurethanes. Biopitch enhanced the oxygen content of the polyurethane foams synthesized, and their reaction with HTPB resulted in stable foams.
Keywords :
Polyurethane , Flexible foam , Biopitch , HTPB
Journal title :
European Polymer Journal(EPJ)
Journal title :
European Polymer Journal(EPJ)