Abstract
Results obtained in the field of theoretical chemistry are utilised to investigate the structure of the nitrile group. Recent developments in high‐polymer physics are used as a basis to explain the relation between the structure of the polyacrylonitrile fibre and its physical behaviour. The interactions between the nitrile groups of the fibres and disperse dyes, and also between the nitrile groups and cationic dyes, are discussed. Consideration is also given to the interaction between cationic dyes and the anionic groups incorporated in commercial polyacrylonitrile fibres under the conditions of polymerisation. Dyeing tests have been carried out on cyanoethylated cotton to confirm the correctness of the concepts developed with regard to the interaction forces between polyacrylonitrile fibre and cationic dyes.
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