Preparation and electrical property of carbon foam grounding material by pyrolysis of cyanate esters modified with phosphorus contained Schiff-base

Compared with metallic grounding material, flexible graphite grounding material is widely applied in grounding field of power system, due to its resistance of corrosion and high impulse current. Novel phosphorus contained Schiff-base is synthesized by 9, 10-dihydro-9-oxa-10-phosphaphenanthrene 10-oxide and furfuryl amine, salicylaldehyde, and is incorporating with CE to prepare a carbon foam by property of the resin blend under nitrogen atmosphere. The curing behavior and pyrolysis mechanism of the resin are investigated by DMA, TGA, FTIR and Raman spectrum. The results indicated that incorporating of PSF leads to incomplete combustion during the pyrolysis processing and results in more residues formed. As the consequence, the carbon foam exhibits good electrical conductivity, due to the formed residues consist of graphite structure.