Premium
Polyesters from lignin. 1. The reaction of kraft lignin with dicarboxylic acid chlorides
Author(s) -
Guo ZhaoXia,
Gandini Alessandro,
Pla Fernand
Publication year - 1992
Publication title -
polymer international
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.592
H-Index - 105
eISSN - 1097-0126
pISSN - 0959-8103
DOI - 10.1002/pi.4990270104
Subject(s) - lignin , polyester , dicarboxylic acid , organic chemistry , pyridine , triethylamine , chemistry , polymer chemistry , kraft paper , dimethylacetamide , thermal stability , terephthaloyl chloride , materials science , condensation polymer , catalysis , solvent , composite material
Kraft lignin was treated with dicarboxylic aliphatic (sebacoyl) or aromatic (terephthaloyl) acid chlorides in N,N ‐dimethylacetamide or N ‐methyl‐2‐pyrrolidone as solvents in the presence of triethylamine or pyridine as catalysts. The polyester gels obtained were characterized by IR after specific extractions and the chemical incorporation of lignin was proved unambiguously. Their thermal behaviour was determined by DSC and TGA; they are amorphous and stable up to 200°C in a nitrogen atmosphere. The reactivities of the two types of hydroxyl group (aliphatic and phenolic) were assessed from model reactions carried out in the same conditions.