각종 용매가 면포의 Sodium화 반응에 미치는 영향에 대한 연구 (II)

A Study on the Effect of Solvents on the Sodium Metallation Reaction of Cotton Fabric (II)

Sodium cellulosates of cotton fabrics were prepared by means of an ion exchange reaction between the preswollen cotton fabrics and various sodium alkoxides in corresponding alcohol; sodium methoxide in methanol, sodium ethoxide in ethanol, sodium n-butoxide in n-butanol and sodium n-propoxide in n-propanol. As a result, the degree of sodium metallation (mol/AGU) was remarkably enhanced by the addition of dimethylsulfoxide (DMSO) or pyridine to the system as a cosolvent. And the demetallation reaction was significantly affected by the degree of acidity, electron donating power, Taft polar substituent constant $\delta$ and Dielectric constant $\varepsilon$ of the alcohol which was used as a demetallation solvent. No significant change in mechanical properties was observed when breaking strength, elongation to rupture and crease angle were checked for regenerated cotton fabrics.