ABSTRACT
The main resonances of polymers in this group lie at 13C chemical shifts between 10 and 60 ppm, and at 1 H shifts between 0.8 and 2 ppm. In general, 13C is the preferred nucleus for identification of unknown polymers, because the larger chemicalshift range permits differentiation among subtle structural variations. In favorable cases, 1H NMR is useful for rapid quantitative analyses, such as comonomer contents; several examples will be discussed later. If the chemical structure of the comonomers is similar, then 13C is the better alternative for quantitation.
