FRINCIPAL COMPONENT ANALYSIS OF THE HYDROXYMETHYLATION OF SUGARCANE LIGNIN: A TEM-DEPENDING STUDY BY FTIR

摘要

The hydroxymethylation of Acetosolv lignin from sugarcane bagasse was studied at 40 deg. C between 0.25 and 8 h by Fourier- transformed infrared spectroscopy (FTIR). Principal Component Analysis (PCA) of the spectra has determined that addition of formaldehyde to the lignin fragments was completed within 4 h. After than time, only condensation of the fragments occurs, leading to a resol-type crosslinked resin.