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Liquefied wood-based polyurethane (PU) foams were made by mixing polyethylene glycol liquefied wood of Cryptomeria japonica with 4,4″-diphenylmethane diisocyanate (PMDI). Glycolysis of PU foams was conducted by using diethylene glycol (DEG), ethylene glycol (EG), and propylene glycol (PG) as solvent with a weight ratio of PU powders to glycol as 0.5/1, 1.0/1, and 1.5/1. The reaction was undergone...
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