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| Journal |
Textile Coloration and Finishing |
Year / Vol.,
Issue, Month |
2015 / V.27,no.1,Mar |
| Title |
Hydrolytic Behavior of Vinylsulfonyl Reactive Dyes- Easiness of Dimerization - |
| Authors |
In Hoi Kim |
| Institution/Affiliations |
SungKyunKwan University |
| Pages/Total page |
pp.1 ~ 10 / 10 |
| Language |
English |
| Abstract |
Abstract: The aim of the current study is to identify the dimerization and decomposition kinetics of the F-DM type. The regeneration of F-VS from FiFj-DM or the reversibility of the dimerizations were investigated. The order of real rate constants of the dimerization(Dij) would seem to be similar to that of rate constants of a dimerization(Dij) for VS dyes at a given pH because of the constancy of the equilibrium constants(��aj-value). The reverse reactions of the DM types are appeared to occur in two steps, the deprotonation of �-carbon of the DM types and disproportionation. The ratio of the decomposition of the DM type to F-Hy and F-VS appears to be related with the ratio of ��i/��j. Similarities were also found among various other reactions, including homo- and mixed dimerization. VS dyes undergoing fast hydrolysis have difficulty in forming a dimer. The higher the reactivity with cellulose or hydroxide ion, the smaller the dimerization. The easiness of the dimerization was thus found to be inversely proportional to the rate of hydrolysis. |
| Keywords |
Keywords: VS dye, hydrolysis, admixture, rate constant, dimerization |
| Download |
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| Reference |
http://www.koreascience.or.kr/article/ArticleFullRecord.jsp?cn=OSGGBT_2015_v27n1_1&ordernum=1 |
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