期刊
POLYMER
卷 54, 期 11, 页码 2632-2638出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2013.03.041
关键词
Cellulose acetate; Degree of substitution; Degree of substitution distribution
资金
- Deutscher Akademischer Austauschdienst (DAAD)
A liquid chromatographic method was developed allowing separating cellulose acetates (CA) with respect to degree of substitution (DS). The normal-phase gradient separation, which is based on an adsorption desorption mechanism, uses a multi-step gradient of dichloromethane (DCM) and methanol (MeOH) on a bare silica column as stationary phase. Applicability of the developed multi-step gradient allows separating CAs within the DS-range DS = 1.5-2.9, which is the target DS-range for most CA applications. To the best of our knowledge the developed method for the first time allows determination of the DS-distribution of intact CA chains over a wide DS-range. (C) 2013 Elsevier Ltd. All rights reserved.
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