Abstract
High-density polyethylene with low levels of butyl branches has been functionalized with diethylmaleate in a solution process in order to obtain very clean products without branching, crosslinking and/or degradation. Analysis of the modificated polymers has been carried out by Fourier-transform IR and 13C NMR spectroscopy. Measurements of the relative areas and intensities of the carbonyl group at 1736 cm −1 have been performed in the 1780-1690 cm −1 region, taking as internal standards the peaks at 1463 and 720cm −1 of the polyethylene chain. The FT-IR method has been correlated with 13C NMR spectral data for a range of diethylmaleate levels between 0.5 and 1.6 mol %.
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