Download Chemical Principles of Synthetic Fibre Dyeing by S.M. Burkinshaw PDF

By S.M. Burkinshaw

Synthetic fibres are wide-spread for lots of purposes, with their color being of significant advertisement significance. This broadly referenced e-book presents a entire account of the actual chemistry of the dyeing of artificial fibres and microfibres.

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Extra info for Chemical Principles of Synthetic Fibre Dyeing

Sample text

Schuler [210] observed that the rate of uptake of disperse dyes on to PET fibre was increased in the presence of carrier and found that the effect of different carriers on dyeing rate was similar when a similar concentration of different carriers was present in the fibre. Glenz et al. [106] showed that the increase in rate of uptake of several disperse dyes on to PET brought about by two carriers was approximately the same for a similar concentration of each carrier in the fibre. These workers [106] also demonstrated that the diffusion coefficient of several disperse dyes in PET was increased in the presence of both carriers used and found a wide variation in the effect of the two carriers on enhancement of diffusion coefficient for dyes of similar structure.

In later work [214], these workers demonstrated that several carriers caused significant swelling of drawn PET filaments and that the diffusion coefficient of CI Disperse Orange 3 in drawn PET filaments was little affected in the presence of varying concentrations of 2-phenoxyethanol in the dyebath, which supported their earlier findings that increased swelling and increased dyeability are not related. Hence, as Waters [8] argued, the effectiveness of a carrier is not solely a function of its ability to swell the fibre.

S* J mol-I K- I 95 182 201 280 ± 15 ± 19 ± 17 ± 16 (Reproduced with permission from G. 6). Furthermore, both the rates of uptake and the equilbrium uptake of the four carriers varied considerably with variation in the chemical nature of the carrier. The observation [213] that the apparent diffusion coefficient of each of the four carriers increased with increasing concentration of carrier in the fibre differs to that for disperse dyes, for which the values of diffusion coefficient decrease with increasing dye uptake owing to a reduction in concentration gradient.

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