Kinetics of Resorcinol-Formaldehyde Condensation-Comparison of Common Experimental Techniques.

ABSTRACT: Porous carbons, originated from resorcinol-formaldehyde (RF) gels, show high application potential. However, the kinetics and mechanism of RF condensation are still not well described. In this work, different methods (dynamic light scattering-DLS, Fourier transform infrared spectroscopy-FTIR, low field 1H nuclear magnetic resonance relaxometry-1H-NMR, and differential scanning calorimetry-DSC) were used to follow the isothermal RF condensation of mixtures varying in catalyst content (Na2CO3) and reactant concentration. The applicability and results obtained by the methods used differ significantly. The changes in functional groups can be followed by FTIR only at very early stages of the reaction. DLS enables the estimate of the growth of particles in reaction solution, but only before the

SUBMITTER: Kinnertova E 

PROVIDER: S-EPMC8775039 | biostudies-literature | 2021 Dec

REPOSITORIES: biostudies-literature