Studying the Dyeing of Fiber Grade PET Using a Hyperbranched Polymeric Additive

In this study, a hyperbranched dendritic additive was used to improve the dyeability of a fibre grade PET. Various samples were prepared in an internal mixer at different concentrations of this additive. DSC was used to study the thermal behavior of the resultant compounded samples. It was shown that Tg of samples decreased as the concentrations of the additive increased. This difference in Tg between the neat PET and the compounded samples composed of 3 wt% hyperbranched was about 11 ºC.Sheet films were prepared and were subsequently dyed using C. I. Disperse Yellow 114 in presence and absence of a carrier. K/S, the dye uptake parameter increased from 1.2 to 3.0 as the concentration of additive increase for samples dyed in the absence of a carrier. The results showed that the need for use of a toxic carrier can be eliminated by this procedure. J. Color Sci. Tech. 4(2010), 25-32 © Institute for Color Science and Technology.