Abstract
Poly(n-butyl acrylate-co-carbon monoxide-co-ethylene) samples with varying monomer compositions and degrees of branching (g‘) were characterized using 750 MHz two-dimensional (2D) pulsed-field gradient (PFG) NMR spectroscopy. The NMR experiments were performed in solution at 100 °C to ensure sample homogeneity and sufficient mobility of the ethylene-based terpolymer. Since the 1H and 13C NMR spectra of the terpolymer samples were complex, 2D-1H/13C-heteronuclear multiple quantum coherence (HMQC) and heteronuclear multiple bond correlation (HMBC) experiments were conducted. The distinctive resonances of the ketone and ester carbonyl groups facilitated spectral assignments, such that chain-end resonances were apparent and the effects of short-chain-branching reactions and monomer sequence distributions were readily observed.
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