The phase partition of disperse dyes in the dyeing of polyethylene terephthalate with a supercritical CO2/methanol mixture

2009 ◽  
Vol 48 (1) ◽  
pp. 72-78 ◽  
Author(s):  
Mauro Banchero ◽  
Ada Ferri ◽  
Luigi Manna
Keyword(s):  
Polyethylene Terephthalate ◽  
Supercritical Co2 ◽  
Disperse Dyes ◽  
Phase Partition ◽  
Methanol Mixture

Extraction of nimbin from neem seeds using supercritical CO2 and a supercritical CO2–methanol mixture

2004 ◽  
Vol 30 (3) ◽  
pp. 287-301 ◽  
Author(s):  
Pathumthip Tonthubthimthong ◽  
Peter L. Douglas ◽  
Supaporn Douglas ◽  
Wilai Luewisutthichat ◽  
Wittaya Teppaitoon ◽  
...  
Keyword(s):  
Supercritical Co2 ◽  
Methanol Mixture

One-step dyeing of polyethylene terephthalate fabric, combining pretreatment and dyeing using alkali-stable disperse dyes

2013 ◽  
Vol 129 (6) ◽  
pp. 438-442 ◽  
Author(s):  
Aiqin Hou ◽  
Min Li ◽  
Fengliang Gao ◽  
Kongliang Xie ◽  
Xingying Yu
Keyword(s):  
Polyethylene Terephthalate ◽  
Disperse Dyes ◽  
One Step

scholarly journals Analysis of Bubble Growth in Supercritical CO2 Extrusion Foaming Polyethylene Terephthalate Process Based on Dynamic Flow Simulation

Polymers ◽  
2021 ◽  
Vol 13 (16) ◽  
pp. 2799
Author(s):  
Shun Yao ◽  
Yichong Chen ◽  
Yijie Ling ◽  
Dongdong Hu ◽  
Zhenhao Xi ◽  
...  
Keyword(s):  
Polyethylene Terephthalate ◽  
Bubble Growth ◽  
Supercritical Co2 ◽  
Flow Simulation ◽  
The Finite Element Method ◽  
Melt Flow ◽  
Dynamic Flow ◽  
Foaming Process ◽  
Dynamic Rheological Properties ◽  
Extrusion Foaming

Bubble growth in the polymer extrusion foaming process occurs under a dynamic melt flow. For non-Newtonian fluids, this work successfully coupled the dynamic melt flow simulation with the bubble growth model to realize bubble growth predictions in an extrusion flow. The initial thermophysical properties and dynamic rheological property distribution at the cross section of the die exit were calculated based on the finite element method. It was found that dynamic rheological properties provided a necessary solution for predicting bubble growth during the supercritical CO2 polyethylene terephthalate (PET) extrusion foaming process. The introduction of initial melt stress could effectively inhibit the rapid growth of bubbles and reduce the stable size of bubbles. However, the initial melt stress was ignored in previous work involving bubble growth predictions because it was not available. The simulation results based on the above theoretical model were consistent with the evolution trends of cell morphology and agreed well with the actual experimental results.

Tungsten-promoted titania as solid acid for catalytic hydrolysis of waste bottle PET in supercritical CO2

RSC Advances ◽  
2016 ◽  
Vol 6 (49) ◽  
pp. 43171-43184
Author(s):  
Wen-Ze Guo ◽  
Hui Lu ◽  
Xue-Kun Li ◽  
Gui-Ping Cao
Keyword(s):  
Hydrothermal Method ◽  
Polyethylene Terephthalate ◽  
Supercritical Co2 ◽  
Solid Acid ◽  
Solid Acid Catalysts ◽  
Acid Catalysts ◽  
Catalytic Hydrolysis ◽  
Hydrolysis Of

Tungsten-promoted titania solid acid catalysts were synthesized by a hydrothermal method and used in the hydrolysis of waste bottle polyethylene terephthalate (PET) in supercritical CO2.

scholarly journals Enhancing the Dyeability of Polypropylene Fibers by Melt Blending with Polyethylene Terephthalate

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Fereshteh Mirjalili ◽  
Siamak Moradian ◽  
Farhad Ameri
Keyword(s):  
Polyethylene Terephthalate ◽  
Tensile Testing ◽  
Disperse Dyes ◽  
Polypropylene Fibers ◽  
Melt Blending ◽  
Thermal And Mechanical Properties ◽  
Scanning Calorimetry ◽  
Dyeing Performance ◽  
Ft Ir ◽  
Ft Ir Spectroscopy

Attempts were made to modify polypropylene fibers by melt blending with polyethylene terephthalate in order to enhance the dyeability of the resultant fiber. Five blends of polypropylene/polyethylene terephthalate/compatibilizer were prepared and subsequently spun into fibers. Three disperse dyes were used to dye such modified fibers at boiling and 130°C. The dyeing performance of the blend fibers, as well as the morphological, chemical, thermal, and mechanical properties, of the corresponding blends was characterized by means of spectrophotometry, polarized optical microscopy, scanning electron microscopy (SEM), FT-IR spectroscopy, differential scanning calorimetry (DSC), and tensile testing.

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