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Polyesters bearing furan moieties, 2 . A detailed investigation of the polytransesterification of difuranic diesters with different diols
Author(s) -
Khrouf Amel,
Abid Majdi,
Boufi Sami,
Gharbi Rachid El,
Gandini Alessandro
Publication year - 1998
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/(sici)1521-3935(19981201)199:12<2755::aid-macp2755>3.0.co;2-2
Subject(s) - polyester , furan , diol , transesterification , catalysis , polymer chemistry , polymer , chemistry , phase (matter) , organic chemistry , materials science
A two‐step transesterification procedure was applied to combinations of difuranic diesters and both aliphatic and furanic diols. The reaction parameters (including the nature of the catalyst) were varied in both phases of the process and the results compared with those published for similar systems based on aromatic diesters. The best results related to the first phase of the synthesis were obtained using Zn(AcO) 2 , Pb(AcO) 2 or Ti(OBu) 4 at 200°C with a large excess of diol. The second phase, which led to the actual polymer at 200–240°C, called upon the catalytic action of SnC 2 O 4 , Sb 2 O 3 and Ti(OBu) 4 and was prolonged until the viscosity of the media ceased to increase. Specific problems, related to some fragile moieties, limited the success of these polymerizations to a number of combinations which gave polyesters bearing regular structures and molecular weights in the tens of thousands.