Influence of the Reactivity of the Thermosetting Component in the Resol Resin/Ethylene Glycol System on the Properties of Pyrolyzates

Properties of pyrolyzates with the developed porous structure, prepared in the system consisting of phenol–formaldehyde resol resin and ethylene glycol after polymerization induced phase separation (PIPS), post-curing, and pyrolysis, were studied. The structure formed in the PIPS step is determined by the reactivity of the thermosetting component. With an increase in the rate of curing of the resol component, at equal PIPS temperature, the macropore size decreases and the cumulative volume of mesopores increases. An increase in the curing rate leads to an increase in the separation intensity and to a decrease in the degree of microphase separation. The pyrolysis yields an X-ray amorphous material with small inclusions of the crystalline graphite phase.