The bulk oxypropylation of chitin and chitosan and the characterization of the ensuing polyols
authors Fernandes, S; Freire, CSR; Neto, CP; Gandini, A
nationality International
journal GREEN CHEMISTRY
keywords SUGAR-BEET PULP; HYDROXYPROPYL CHITIN; DERIVATIVES; CORK; POLYURETHANES; SPECTROSCOPY; URETHANES; LIGNINS
abstract Chitin and chitosan were converted into viscous polyols through a simple oxypropylation reaction, with the aim of valorising the less noble fractions or by-products of these valuable renewable resources. This process bears "green'' connotations, given that it requires no solvent, leaves no by-products and no specific operations (separation, purification, etc.) are needed to isolate the entire reaction product. Chitin or chitosan samples were preactivated with KOH and then reacted with an excess of propylene oxide (PO) in an autoclave. In all instances, the reaction product was a viscous liquid made up of oxypropylated chitin or chitosan and PO homopolymer. The two fractions were separated and thoroughly characterized by FTIR and NMR spectroscopy, DSC, TGA and viscosity.
publisher ROYAL SOC CHEMISTRY
issn 1463-9262
year published 2008
volume 10
issue 1
beginning page 93
ending page 97
digital object identifier (doi) 10.1039/b711648a
web of science category Chemistry, Multidisciplinary; GREEN & SUSTAINABLE SCIENCE & TECHNOLOGY
subject category Chemistry; Science & Technology - Other Topics
unique article identifier WOS:000252106600013
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journal analysis (jcr 2019):
journal impact factor 9.48
5 year journal impact factor 9.707
category normalized journal impact factor percentile 92.662
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