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Polymer, Vol.52, No.16, 3519-3521, 2011
High-sensitivity determination of graft ratio of maleic anhydride-grafted polyolefin by anhydride methylation in supercritical methanol followed by H-1 NMR spectroscopy
A wide range of graft ratios in Maleic anhydride (MA)-grafted polyolefin (PO), MA-g-PO, was determined by the combination of the methylation of grafted MA in supercritical methanol with quantification by H-1 NMR spectroscopy. The combination enabled the determination of a graft ratio as low as 0.01 wt% (100 ppm) in MA-g-PO. (C) 2011 Elsevier Ltd. All rights reserved.