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Thermal characterization and comparisons of lignin-formaldehyde and lignin-glyoxal adhesives

Mohamed Ammar, Ramzi Khiari, Mohamed Naceur Belgacem, Elimame Elaloui


In the present study, the main focus was the use of lignin isolated through an industrial waste (black liquor) to prepare phenolic-type resins. Thermal properties of control lignin-formaldehyde adhesive (RLF) and lignin –glyoxal adhesive (RLG) have been investigated in detail. The effect of methylolation of lignin by formaldehyde and glyoxal have been studied using thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). Methylolation has significant effect on the structure and the thermal stability of lignin. Rate of curing is enhanced by the type of curing agent and temperature.

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