Study of xanthate group distribution during ripening of viscose

Abstract

<span style="font-size:12.0pt;line-height: 115%;font-family:" times="" new="" roman";mso-fareast-font-family:"times="" roman";="" color:#232323;mso-ansi-language:en-in;mso-fareast-language:en-in;mso-bidi-language:="" hi"="" lang="EN-IN">The dexanthation of sodium cellulose xanthate has been studied for a viscose prepared from sulphite and kraft pulps. The ripening of viscose was carried out in the presence of an ion-exchange resin which eliminates the rexanthation of cellulose molecule. The decomposition rate of cellulose xanthate at carbon position 2, 3 and 6 were determined. The gamma number at C_2,3 decreases continuously during the ripening of viscose, whereas gamma number at C₆ increases initially and passes through a maximum. The viscose prepared from a sulphite pulp showed higher dexanthation rate than that of kraft pulp.</span>