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The effects of pregrafting cotton fabrics with MAA/MAM on the dyeing kinetics of direct dyes in a finite bath
Author(s) -
Huang K. S.,
Min R. R.,
Yen M. S.
Publication year - 1997
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/(sici)1097-4628(19970808)65:6<1139::aid-app9>3.0.co;2-l
Subject(s) - dyeing , kinetics , methacrylic acid , diffusion , polymer chemistry , monomer , molar ratio , materials science , reaction rate constant , activation energy , absorption (acoustics) , chemistry , equilibrium constant , chemical engineering , nuclear chemistry , composite material , polymer , organic chemistry , thermodynamics , physics , catalysis , quantum mechanics , engineering
The influence of pregrafting of cotton fabrics with mixed monomer on the dyeing kinetics of direct dyes was investigated. The results of this research show that the equilibrium absorption ( a e ) and activation energy (Δ E *) in the dyeing of grafted fabrics are smaller than those of ungrafted fabrics. The experimental results show that the value of the equilibrium absorption is smallest when the molar ratio of MAA/MAM (methacrylic acid/methylacryl amide) is 4/6. However, the rate constant ( k ′) is larger for grafted fabrics than for ungrafted fabrics. No significant difference was observed between the structural diffusion resistance constant ( n ) of grafted and ungrafted fabrics. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:1139–1142, 1997