A facile method to determine the distribution of methyl groups in regioselectively methylated celluloses on anhydroglucose unit was developed using solution 1H-NMR analysis. The determination was deduced from the assignment of the signals of each proton, which directly attached to the glucopyranose ring carbon for partially methylated 2,3-di-O-methylcellulose samples observed in D2O. These data for the distribution of the methyl groups corresponded to those based on the gaschromatographic analysis. This method using the 1H-NMR spectroscopy can facilitate the measurements of the distribution of methyl groups for randomly substituted and commercially available O-methylcelluloses.
|Number of pages||8|
|Publication status||Published - Mar 11 2002|
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Polymers and Plastics
- Materials Chemistry