A Study of the Abnormal Viscosity of Procion‐dyed Cellulose in Cuprammonium Hydroxide

Mehta, Heena; Ravikrishnan, Menakshisundaram; Chitale, A. G.

doi:10.1111/j.1478-4408.1962.tb02466.x

Cited by 30 publications

(2 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The Hy types of these dyes were purified by the same method as described previously 9) . The molar extinction coefficients of the Hy type for each dye at various wavelengths in water are listed in Table 1.…”

Section: Experimental 21 Reactive Dyesmentioning

confidence: 99%

Hydrolytic Behavior of Vinylsulfonyl Reactive Dyes - Easiness of Dimerization -

Kim¹

2015

Textile Coloration and Finishing

View full text Add to dashboard Cite

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(′ D ij ) would seem to be similar to that of rate constants of a dimerization( D ij ) for VS dyes at a given pH because of the constancy of the equilibrium constants( a j -value). The reverse reactions of the DM types are appeared to occur in two steps, the deprotonation of α-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.

show abstract

Section: Experimental 21 Reactive Dyesmentioning

confidence: 99%

Hydrolytic Behavior of Vinylsulfonyl Reactive Dyes - Easiness of Dimerization -

Kim¹

2015

Textile Coloration and Finishing

View full text Add to dashboard Cite

show abstract

“…C.I. Acid Red 1, as shown in Figure 1, was used in this study and was purified by the method of DMF dissolution-acetone precipitation [11,12]. Scoured pure silk crepe satin was used throughout this study.…”

Section: Experimental Materialsmentioning

confidence: 99%

Influence of water hardness on acid dyeing with silk

Kan

2008

Fibers Polym

View full text Add to dashboard Cite

In this paper, the effect of water hardness, expressed in CaCO 3 equivalent, on the dyeing silk with acid dye under acid, alkaline and isoelectric point dyeing conditions was studied by zeta potential method. Under acid condition and in the presence of calcium ion, the positive zeta potential of silk was found to decrease with a reduction in the dye adsorption. Such a phenomenon might be due to the presence of cation which increased the dyeing potential barrier at the interface between fibre and dye solution. This would result in a higher resistance of dye anions passing through the interface. Under alkaline condition, the zeta potential on silk was negative and resulted in a strong potential barrier for the dye anions. The presence of calcium ion would result in a decrease in the absolute value of zeta potential of silk fibre with an overall increase in dye absorption. Under isoelectric point, the zeta potential of silk fibre was found to be near zero and dye adsorption was not influenced by the cations. When studying the effect of calcium ion on the silk dyeing with acid dye under acid, alkaline and isoelectric point dyeing conditions, it was found that calcium ions influenced dye exhaustion and fixation greatly under acidic and alkaline dyeing conditions, which such influence became much smaller when the pH of dyebath was at the isoelectric point of the fibre. These results showed that calcium ion could produce strong electrolytic effect on dyeing even under very low concentrations.

show abstract

Behavior of cellulose grafted with poly(methyl methacrylate) and polyacrylonitrile toward some direct and reactive dyes

Kamel

Hebeish

1976

J of Applied Polymer Sci

View full text Add to dashboard Cite

SynopsisViscose rayon fibers modified with polyacrylonitrile (PAN) and poly(methy1 methacrylate) (PMMA) were dyed with some direct and reactive dyes. Exhaustion rate of the dye onto fibers was governed by the amount and nature of the polymer grafted. In general, the dye affinity for cellulose and dye exhaustion onto fibers decreased as the graft yield increased. Dye affinity for the PAN-cellulose graft copolymers was greater than that found with PMMA-cellulose graft copolymers. Except in a few cases, the tendency of cellulose graft copolymers of ca. 13% graft to accept direct dyes was more than that of the untreated cellulose, whereas the affinity of reactive dyes for cellulose graft copolymers of up to ca. 43% polymer was more than that of untreated cellulose. The dye fixation, based on the weight of cellulose component, increased as the graft yield increased. The dyeability of cellulose oxidized with ceric ammonium nitrate was also examined. Oxidation of cellulose prior to dyeing reduced the affinity of the dye for cellulose.

show abstract

A Study of the Abnormal Viscosity of Procion‐dyed Cellulose in Cuprammonium Hydroxide

Cited by 30 publications

References 9 publications

Hydrolytic Behavior of Vinylsulfonyl Reactive Dyes - Easiness of Dimerization -

Hydrolytic Behavior of Vinylsulfonyl Reactive Dyes - Easiness of Dimerization -

Influence of water hardness on acid dyeing with silk

Behavior of cellulose grafted with poly(methyl methacrylate) and polyacrylonitrile toward some direct and reactive dyes

Contact Info

Product

Resources

About