Analysis of Pyrolytic Process of a Phenolic Resin Used to Fabricate Mesoporous Carbon Monoliths

The pyrolytic process of a phenolic resin(PF),which is used as precursor to fabricate mesoporous carbon monoliths,is investigated by SEM、XRD and TG.The results show that PF is initially formed from glassy carbon at 800℃.Then,with increasing pyrolytic temperature,the crystalline stacks with graphite structure in the glassy carbon are growing-up and ordering,which induce graphitization of the glassy carbon.As a result,the number of the pores in glassy carbon deceases,the volume of glassy carbon contracts and the bulk density increases.However,the PF is not completely graphitized even if the pyrolytic temperature reaches 1200℃.Moreover,there are three temperature ranges,in which the maximum of weight-loss velocity occurs,during pyrolysis of PF.Thus,it is indispensable to establish reasonable heating program for these temperature ranges in order to avoiding the crack of the carbonized products.