Disperse dyes participate in the structural modifications of polyester fibers during dyeing. The change in the mechanical properties of the disperse-dyed polyester fibers over the blank-treated ones is, however, due to mechanical hindrance of the dye, which is dependent on the structure and the concentration of dye in the fiber. The dye-induced structural change has little or no effect on the mechanical properties.
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References
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Lipp-Symonowicz, B. and Urbanczyk, G.W., Changes in the Fine Structure of Polyethylene Terephthalate Fibers in Disperse Dyeing, Melliand Textilber.55, 59-64 (1974).
