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Substituent Distribution in Cellulose Acetates: Its Control and the Effect on Structure Formation in Solution

✍ Scribed by Yoshisuke Tsunashima; Kimihiko Hattori

Publisher: Elsevier Science
Year: 2000
Tongue: English
Weight: 107 KB
Volume: 228
Category: Article
ISSN: 0021-9797
DOI: 10.1006/jcis.2000.6952

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✦ Synopsis

Architecture-regulated cellulose derivatives were prepared by regioselective substitution of C-2, -3, and -6 position hydroxyls in cellulose by O-acetyls or trityls. Their dynamic structures formed in polar solvents were compared with those by the commercial cellulose acetates where the distribution of hydroxyls and O-acetyls was nearly random in the chain. It was found that the difference in the chain architecture induces a large difference in the chain conformation, the solubility, and the clustering mechanism and structures; i.e., they changed with solvent quality, concentration, temperature, strength of external field, and so on.

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