Abstract
A low temperature dyeing technique that was developed as a characterization method for poly(ethylene terephthalate) (PET) partially oriented yarns revealed thermally activated interactions between the fibers and spin finishes containing pure or close derivatives of poly(ethylene glycol) (PEG) that bring about dye blocking. Similar effects were also exerted by these spin finishes on the critical dissolution times and amine etching resistance of the fibers. The PEG interaction with the fibers is most effective in the narrow molecular weight range of Mn = 500 ± 100 g/mol. Specific thermal (shrinkage, shrinkage stress relaxation) and other structural characterization techniques (WAXS, DSC, Raman, IR) indicated that the PEG interactions bring about higher degrees of intermolecular cohesion and order in the PET fibers. The PEG molecular weight dependence of the dyeblocking is rationalized in terms of the permeability and compatibility of PEG.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
