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Studies in dyeing. I. Effect of crystal modification of disperse dyes on their dyeing behavior
Author(s) -
Shenai V. A.,
Sadhu M. C.
Publication year - 1976
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/app.1976.070201118
Subject(s) - dyeing , polyester , disperse dye , materials science , cellulose acetate , melting point , polyamide , synthetic fiber , crystal (programming language) , fiber , saturation (graph theory) , polymer chemistry , polymer , chemical engineering , composite material , cellulose , organic chemistry , chemistry , computer science , engineering , programming language , mathematics , combinatorics
Three commerical disperse dyes and a laboratory‐synthesized disperse azo dye were converted to different crystal forms. These were characterized by melting point, x‐ray diffractograms, and their dyeing behavior on polyester fibers. The different crystal modifications of the same dye were shown to dye polyester fibers (but not polyamide fibers) at different rates and to different fiber saturation values. An attempt has been made to explain these differences based on a thermodynamic approach. An attempt is made to apply the concept of crystal modification of disperse dyes to some of the earlier studies done on dyeing and printing of disperse dyes on polyester and secondary cellulose acetate substrates reported in the literature.