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Four kinds of biorefinery residues (the ethanol, the butanol, the xylitol and the lactic acid biorefinery residue) were utilized to modify the phenol–formaldehyde (PF) resin, respectively by copolymerization. Prior to the reaction, the composition and functional group of each biorefinery residue were characterized and used to evaluate their suitability as replacement for the preparation of PF resins...
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