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Characterization of cellulose acetate in acetone solution. Studies on prehump II in GPC pattern
Author(s) -
Funaki Yoshinori,
Ueda Kazuyoshi,
Saka Shiro,
Soejima Shigeru
Publication year - 1993
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.1993.070480306
Subject(s) - cellulose acetate , gel permeation chromatography , acetone , elution , chemistry , sulfuric acid , cellulose , chromatography , acetylation , column chromatography , polymer chemistry , cellulose triacetate , organic chemistry , polymer , biochemistry , gene
Cellulose acetate in acetone solution is known to show some peaks in its chromatogram as measured by gel‐permeation chromatography. These peaks are named from the shorter elution time as prehump I, prehump II, and main hump. In our previous paper, we characterized prehump I. In this study, the second peak, prehump II, was fractionated by using the large‐scale GPC column and its molecular properties were investigated. The results have shown that the molecules of prehump II are not aggregated but molecularly dispersed with some anionic residues. These anionic groups may be sulfuric acid groups introduced during the acetylation process as a catalyst that interact repulsively with the anionic groups of the GPC column gel. This resulted in the phenomenon that the prehump II elutes earlier than the main hump in the GPC chromatogram. © 1993 John Wiley & Sons, Inc.