An efficient method for determination of the degree of substitution of cellulose esters of long chain aliphatic acids
authors Freire, CSR; Silvestre, AJD; Neto, CP; Rocha, RMA
nationality International
journal CELLULOSE
author keywords alkaline hydrolysis; cellulose esters; degree of substitution (DS); fatty acids; GC-MS
keywords FATTY-ACID; ESTERIFICATION; DS
abstract The determination of the degree of substitution (DS) of fatty acid cellulose esters, representing a broad range of substituents (C-6, C-12, C-18 and C-22), was performed by alkaline hydrolysis of the ester groups and the quantification of fatty acids by gas chromatography-mass spectrometry (GC-MS) as their trimethylsilyl derivatives. The method was optimized and compared with established techniques for the DS determination (elemental analysis and alkaline hydrolysis/titrimetry). The results demonstrated that alkaline hydrolysis/GC-MS is a rapid, reliable and powerful method for analysis of fatty acid cellulose esters, particularly when different acyl substituents are present.
publisher SPRINGER
issn 0969-0239
year published 2005
volume 12
issue 5
beginning page 449
ending page 458
digital object identifier (doi) 10.1007/s10570-005-2203-2
web of science category Materials Science, Paper & Wood; Materials Science, Textiles; Polymer Science
subject category Materials Science; Polymer Science
unique article identifier WOS:000232663300001
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journal analysis (jcr 2019):
journal impact factor 4.21
5 year journal impact factor 4.512
category normalized journal impact factor percentile 92.816
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