Wool/Polymer Interactions

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Abstract
No relationship was observed between polymer shrink-resist effectiveness (SRE) and gravimetric swelling in water of films formed from anionic polyesterurethane dispersions. However, there was a linear relationship between SRE and stress measured at 100% elongation of the swollen films. Polymer SRE depended upon the amount of unreacted isocyanate groups in the dispersion at the time of appli cation to the fabric. Polymer properties changed with the counterion and the concentrations of ionic groups and urea groups. A good linear relationship between wool/polymer adhesion and polymer SRE was established using single wool fibers and several of the polymers. It is postulated that the presence of unreacted isocyanate groups in the dispersion changes the surface component of adhesion and therefore influences the polymer SRE.