The mechanism of dyeing of acrylic polymers with cationic dyes is discussed, and it is shown that equilibrium adsorption is adequately described by the Langmuir equation. The presence of both strong and weak acid groups in commercial acrylic polymers is demonstrated. The effect on equilibrium dye uptake of the different response of the two types of groups to variation in pH is considered.
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Balmforth et al. (1964) studied this question.
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