Determination methods of the grafting yield in glycidyl methacrylate-grafted ethylene/propylene/diene rubber (EPDM-g-GMA): Correlation between FTIR and H-1-NMR analysis

A normalized and universally applicable calibration function for the Fourie r-transformed infrared (FTIR) quantification of the glycidyl methacrylate ( GMA) grafting yield in polymers of known compositions having ethylene block sequences was established. The H-1 nuclear magnetic resonance (H-1-NMR) sp ectroscopy results achieved on different GMA-grafted ethylene/propylene/die ne rubber (EPDM-g-GMA) and ethylene/GMA copolymers were correlated to their FTIR data to calibrate the relative determination of the FTIR method. Both direct and indirect standardization approaches were followed and evaluated . The calibration deduced was used to investigate the free radical grafting reaction of GMA on EPDM rubber in the melt phase. (C) 1999 John Wiley & So ns, Inc.