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Synthesis and hydrolysis of β-cyanoethyl ether of poly(vinyl alcohol)

✍ Scribed by X. Li; S. H. Goh; Y. H. Lai; Shu-Mei Deng

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
209 KB
Volume
73
Category
Article
ISSN
0021-8995

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✦ Synopsis

Poly(vinyl alcohol) (PVA) was cyanoethylated by reaction with acrylonitrile in the presence of sodium hydroxide and quaternary ammonium halide. Quaternary ammonium halide, acting as a phase transfer catalyst, increases the degree of substitution (DS) of PVA. The DS also increased with increasing acrylonitrile concentration. Cyanoethylation of PVA up to 98% can be achieved under optimum conditions. The hydrolysis of ␤-cyanoethyl ether of PVA (CN-PVA) was studied. The rate of hydrolysis was affected by the sodium hydroxide concentration and the reaction temperature. The rheological properties of aqueous solution of hydrolysis product of CN-PVA were determined at different temperatures, and the flow activation energy was calculated.

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