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The aim of the present study was to determine whether polyurethane (PU) foams can be prepared from heavy oil derived from biomass liquefaction. Since the hydroxyl number of the heavy oil was only 212mgKOH/g, it was modified by polyols, and a hydroxyl number of 564.5mgKOH/g was obtained. However, secondary hydroxyls rather than primary hydroxyls were introduced. As a result, when 10wt.% activated heavy...
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