Abstract
The reaction of glucuronoxylan from birch wood with 2-chloro-N,N-dimethylethyl-, 2-chloro-N,N-diethylethyl- and 2-chloro-N,N-diisopropylethylamine hydrochloride in 1,2-dimethoxyethane as slurry medium was investigated. The degree of substitution (DS, up to 1.54) of the products could be controlled by adjusting the molar ratio of biopolymer to reagent and depends on the reagent used. The structure of the novel xylan derivatives was confirmed by means of DEPT(135) NMR spectroscopy. The solubility of the polymers with different alkyl moieties possesses a pH value-dependency as studied by turbidity measurements.
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