Abstract
To obtain sufficient dyeability, dyeing of poly(ethylene terephthalate) fabrics must be performed at high temperature and high pressure or by using a no-eco-friendly carrier at atmospheric pressure, which implies large energy consumption and environmental contamination. In order to improve the sustainability of the dyeing process, a carrier-free and low-temperature dyeing procedure was developed for the poly(ethylene terephthalate) copolyester (MCDP) incorporated with sodium-5-sulfo-bis(hydroxyethyl)-isophthalate (SIP) and 2-methyl-1,3-propanediol (MPD). The results obtained from cationic dyeing at optimized conditions show an outstanding dye utilization (99.0%) with MCDP, which is much higher than that of the conventional SIP-modified copolyester. Meanwhile, the introduction of SIP and MPD contents ensures the large adsorption and fast diffusion of dye molecules into the amorphous region of fibers, allowing an efficient and deep disperse dyeing of polyester fabrics under atmosphere in the absence of carr...
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