Multiwall　carbon　nanotubes　(MWCNTs)/carbon　foam　composites　were　prepared　by　direct　pyrolysis　of　MWCNTs/cyanate　ester　(CE)　resin　mixtures.　Pyrolysis　behavior　of　the　MWCNTs/CE　resin　mixtures　was　characterized　by　thermogravimetric　analysis　(TGA),　scanning　electron　microscopy　(SEM)　and　X-ray　diffraction　(XRD).　In　addition,　physical　and　mechanical　properties　of　the　resultant　pyrolysis　products　were　studied.　Results　show　that　the　pyrolysis　products　are　the　MWCNTs/carbon　foam　composites　with　an　amorphous　structure.　The　addition　of　WMCNTs　results　in　an　increase　in　the　density　of　the　composites　and　a　decrease　in　their　porosity.　Moreover,　the　compressive　strength　of　the　composites　as　well　as　their　thermal　conductivity　and　electrical　conductivity　increase　with　an　increase　in　the　additive　amount　of　WMCNTs　from　0　to　1.0　wt.%.　(C)　2013　Elsevier　B.V.　All　rights　reserved.