Structural and physico-chemical properties change of polyethylene terephthalate (PET) fibers after supercritical fluid dyeing with CI disperse red 167

The effects of supercritical CO2 and C.I. Disperse Red 167 as media on the structural and chemical properties of polyethylene terephthalate (PET) fibers were observed in the supercritical dyeing process of these fibers using numerous methods to predict changes in their physical properties. PET samples were classified into three cases based on the sample preparation and analysis steps. When the PET fibers were treated without C.I. Disperse Red 167 under a supercritical fluid CO2 solvent at 120 degrees C and 25 MPa, their crystallinity, orientation, and tensile strength decreased the most among the three cases, whereas when they were treated with C.I. Disperse Red 167 under the same conditions, the three above-mentioned characteristics were relatively improved compared to the scenario without the C.I. Disperse Red 167 treatment. These experimental results provided significant information on the effects of supercritical CO(2 )and C.I. Disperse Red 167 on the properties of PET fiber polymers.

Automated summary

The effects of supercritical CO2 and C.I. Disperse Red 167 on the structural and chemical properties of PET fibers were observed, showing that treatment with C.I. Disperse Red 167 under these conditions can improve their crystallinity, orientation, and tensile strength compared to treatment without it.