A kinetic study of the depolymerisation of poly(ethylene terephthalate) by phase transfer catalysed alkaline hydrolysis

1,4-Bis (dimethyl) benzyl octyl ethylene diammonium bromide chloride has been synthesized, characterized and applied as new phase transfer catalyst in the alkaline hydrolysis of PET leading to depolymerisation. The new phase transfer catalyst has been compared with the alkaline hydrolysis of PET using zinc sulfate as catalyst in the depolymerization. It was found that the newly synthesized phase transfer catalyst exhibited excellent conversion than the alkaline hydrolysis of PET using zinc sulfate as catalyst.

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Poly(ethylene terephthalate) Recycling and Recovery of Pure Terephthalic Acid. Kinetics of a Phase Transfer Catalyzed Alkaline Hydrolysis

Macromolecular Materials and Engineering ◽

10.1002/1439-2054(20011001)286:10<640::aid-mame640>3.0.co;2-1 ◽

2001 ◽

Vol 286 (10) ◽

pp. 640 ◽

Cited By ~ 55

Author(s):

Vassilis A. Kosmidis ◽

Dimitris S. Achilias ◽

George P. Karayannidis

Keyword(s):

Alkaline Hydrolysis ◽

Terephthalic Acid ◽

Ethylene Terephthalate ◽

Phase Transfer ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene ◽

Kinetics Of

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Ultrasound assisted alkaline hydrolysis of poly(ethylene terephthalate) in presence of phase transfer catalyst

Polymer Degradation and Stability ◽

10.1016/j.polymdegradstab.2013.06.030 ◽

2013 ◽

Vol 98 (10) ◽

pp. 2094-2101 ◽

Cited By ~ 12

Author(s):

Nutan Rajesh Paliwal ◽

Arvind Kumar Mungray

Keyword(s):

Alkaline Hydrolysis ◽

Ethylene Terephthalate ◽

Phase Transfer ◽

Phase Transfer Catalyst ◽

Poly Ethylene Terephthalate ◽

Ultrasound Assisted ◽

Poly Ethylene ◽

Hydrolysis Of

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Modifying the surface of poly(ethylene terephthalate) nanofibrous materials by alkaline treatment and TiO2 nanoparticles

Journal of Industrial Textiles ◽

10.1177/1528083717716164 ◽

2017 ◽

Vol 47 (8) ◽

pp. 1944-1958 ◽

Cited By ~ 3

Author(s):

Ali Karimi ◽

Hossein Izadan ◽

Akbar Khoddami ◽

Seyed A Hosseini

Keyword(s):

Electron Microscope ◽

Scanning Electron Microscope ◽

Alkaline Hydrolysis ◽

Ethylene Terephthalate ◽

X Ray Diffraction ◽

X Ray ◽

Poly Ethylene Terephthalate ◽

Dye Absorption ◽

Poly Ethylene ◽

Scanning Electron

The mutual effects of nano-TiO2 and alkaline hydrolysis on the morphology, chemical structure, water absorption, and the dyeing behavior of poly(ethylene terephthalate) nanofibers were investigated via employing scanning electron microscope, Fourier Transform Infra Red Spectroscopy (FTIR) and X-ray diffraction, and measuring water contact angle, 3M repellency, and dye absorption. A direct relation between the alkaline hydrolysis rate and nanofibers hydrophilicity was observed, while the addition of the nano-TiO2 led to more hydrophobicity. However, the alkaline hydrolysis had the prominent effect. FTIR spectra illustrated no chemical interaction between the nanoparticles and nanofibers. It was also shown that the dye absorption at dyeing equilibrium and the rate of dyeing were increased by the presence of the nano-TiO2 and these effects were intensified by the alkaline hydrolysis. These observations were related to the reduction in the nanofibers diameter and the increase in the surface roughness, as evidenced in the scanning electron microscope, and the increase in the amorphous regions of the nanofibers, as shown by the X-ray diffraction diffractograms.

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