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Determination of the substitution pattern in the polymer chain of cellulose acetates

✍ Scribed by Jürgen Heinrich; Petra Mischnick

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
127 KB
Volume
37
Category
Article
ISSN
0887-624X

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✦ Synopsis

Cellulose acetates have been investigated on different structural levels. Based on the determination of the acetate pattern of the monomers, a method has been developed to describe the distribution of the acetyl groups in the polymer chain. This approach comprises permethylation with methyl triflate, deacetylative deuteromethylation under alkaline conditions, random cleavage, remethylation with methyl-d 3 , FAB-MS analysis and comparison of the experimental data with those calculated for a random acetate pattern. Results are discussed with respect to the conditions of the acetylation reactions.

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The states of water in cellulose acetate
The states of water in cellulose acetate membranes
✍ Yoshio Taniguchi; Shinkichi Horigome 📂 Article 📅 1975 🏛 John Wiley and Sons 🌐 English ⚖ 320 KB

## Abstract Differential scanning calorimetric melting endotherms of wet and half‐dried cellulose acetate membranes and salt distribution coefficients were studied to clarify the states of water in membranes. We have suggested that (a) there are four states of water in cellulose acetate membranes;