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Reversible crosslinking in cellulose. I. Determination of mercaptan and disulfide in modified cotton
Author(s) -
Sakamoto Munenori,
Yamada Yoshio,
Tonami Hiroaki
Publication year - 1969
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.1969.070130904
Subject(s) - iodometry , chemistry , cellulose , iodine , methylene blue , polarography , hydrolysis , titration , polymer chemistry , disulfide bond , alkaline hydrolysis , autoxidation , tosyl , nuclear chemistry , organic chemistry , inorganic chemistry , catalysis , biochemistry , photocatalysis
Mercaptan and disulfide contents of modified cotton fabrics could be determined by application of Leach's polarographic method for wool, with minor modification. It was found that mercaptocellulose prepared by the reaction of tosyl cellulose and potassium thiolacetate followed by alkaline hydrolysis contained considerable amounts of disulfided in addition to mercaptain. Iodometric titration of mercaptocellulose gave a higher value of mercaptan than that obtained by the polarographic method. The mercaptan and disulfide contents and methylene blue uptake of the iodine‐treated samples indicate that some of the mercaptan groups further undergo oxidation to acidic groups as a result of the iodine treatment. The spatial effect in the oxidation of mercapto groups in modified cotton is briefly discussed.