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I It has not yet been clarified which component contributes the majority of free £­OH groups, the remaining liquefaction reagent or the product of the wood liquefaction process. In other words, it is not known if the converted wood in the liquid mixture acts as a polyol component for further reactions or only as a filler in preparation of the mentioned biocopolymers, or both. One way of obtaining this information could be to remove residual liquefaction reagent and examine thusly formed liquefied wood-based biopolymers.

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