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