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The microstructure of poly(vinyl alcohol-co-vinyl levulinate) (VOH–VLA copolymer) was studied by 1 H NMR and 13 C NMR techniques. The sequence distributions could be obtained from the six methine triads observed in the 500-MHz 1 H NMR spectra of the copolymers: the three methylene dyads and the three carbonyl triads observed in 125.6-MHz 13 C NMR spectra of the copolymers...
Poly(vinyl alcohol-co-vinyl levulinate) was synthesized by N,N-dicyclohexylcarbodiimide assisted esterification of poly(vinyl alcohol) with free levulinic acid using 4-pyrrolidino pyridine as a catalyst in N,N-dimethyl acetamide/lithium chloride solvent system in order to optimize the reaction condition. The vinyl levulinate content in the copolymer was attained up to 0.95. The 13 C NMR dyad...
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