Premium
Urethanes and polyurethanes based on oxypropylated cork: 1. Appraisal and reactivity of products
Author(s) -
Evtiouguina Margarita,
Gandini Alessandro,
Neto Carlos Pascoal,
Belgacem Naceur M
Publication year - 2001
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.760
Subject(s) - cork , isocyanate , reactivity (psychology) , fourier transform infrared spectroscopy , polymer chemistry , chemistry , kinetics , reaction rate constant , organic chemistry , polyurethane , materials science , chemical engineering , medicine , biochemistry , physics , alternative medicine , pathology , quantum mechanics , engineering
The reaction of various polyols derived from the oxypropylation of cork with aliphatic and aromatic mono‐ and diisocyanates was studied in solution at room temperature. In all instances, good second‐order kinetics were observed and the corresponding rate constant determined. The reactivity of the aromatic isocyanate was found to be much higher than that of aliphatic counterparts. The ensuing urethanes and polyurethanes were characterised by FTIR and 1 H NMR spectroscopy, DSC and sol/gel distribution. © 2001 Society of Chemical Industry