chemical modification of the PSP by alkali treatment was monitored using Jasco FTIR spectrometer.
IR spectra of PSP and alkali treated PSP are shown inkk. From the spectrum, it can be seen that in unmodified PSP a broad peak in the region , which is characteristic of the cellulosic -OH group. the intensity of this -OH group is reduced in alkali treated PSP due to the removal of _OH group by -ONa. corresponding decrease in the intensity of all other peaks has also been observed in APSP spectrum, which is due to the removal of lignin and impurities after alkali treatment.
waxes