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Cystine, Amine Reactions and their Influences on the Dyeing and Cold Setting of Wool
Author(s) -
Asquith Raymond S.,
Hanna H. Diarmair,
Otterburn Michael S.
Publication year - 1975
Publication title -
journal of the society of dyers and colourists
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 0037-9859
DOI - 10.1111/j.1478-4408.1975.tb03240.x
Subject(s) - wool , dyeing , chemistry , amine gas treating , cystine , polymer chemistry , intermolecular force , side chain , ammonium , ionic bonding , organic chemistry , molecule , cysteine , materials science , ion , composite material , enzyme , polymer
The interaction of primary amines with wool cystine under mild conditions has been examined. It has been shown that, over a limited range, the extent of reaction increases with the side‐chain length of the amine. Studies of the dyeability of wool modified by such treatments have shown that the enhanced basicity of the wool is not the only factor in determining the rate of exhaustion and fixation of dyes. Reasons for the changes in dyeability observed have been suggested. It has been shown that thioglycollate salts of primary aliphatic amines give significantly different results to ammonium thioglycollate when wool fibres are reductively set with these materials. The importance of ionic interaction, hydrophobic bonding and bulky side‐chains in set stabilization is considered in relation to the observed results obtained on reductive setting with amine‐modifled reducing solutions. In the systems studied, it would appear that, within fixed limits, the length of the aliphatic side‐chains involved in hydrophobic bonding is not the determining factor in relation to the stability of the intermolecular bonding.