Efficient glycolysis of PET catalyzed by a metal-free phosphazene base: the important role of EG-

Green Chemistry ◽

10.1039/d1gc03885k ◽

2022 ◽

Author(s):

Chumeng Fan ◽

Lei Zhang ◽

Chenxi Zhu ◽

Jingjing Cao ◽

Yunlong Xu ◽

...

Keyword(s):

Ethylene Glycol ◽

Ethylene Terephthalate ◽

High Quality ◽

Metal Free ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene

Developing efficient metal-free catalyst for the glycolysis of waste poly(ethylene terephthalate) (PET) with ethylene glycol (EG) has attracted increasing attention due to the demanding require for high-quality monomer used in...

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Alkali resistance of poly(ethylene terephthalate) (PET) and poly(ethylene glycol-co-1,4-cyclohexanedimethanol terephthalate) (PETG) copolyesters: The role of composition

Polymer Degradation and Stability ◽

10.1016/j.polymdegradstab.2015.07.008 ◽

2015 ◽

Vol 120 ◽

pp. 232-243 ◽

Cited By ~ 17

Author(s):

Tingting Chen ◽

Weikai Zhang ◽

Jun Zhang

Keyword(s):

Ethylene Glycol ◽

Ethylene Terephthalate ◽

Alkali Resistance ◽

Poly Ethylene Glycol ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene

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Ethylene Glycol and Glycerin as the Solvent for Alkaline Treatment of Poly(ethylene Terephthalate) Fabrics

Textile Research Journal ◽

10.1177/004051759706701009 ◽

1997 ◽

Vol 67 (10) ◽

pp. 760-766 ◽

Cited By ~ 4

Author(s):

M.-C. Yang ◽

H.-Y. Tsai

Keyword(s):

Ethylene Glycol ◽

Degradation Rate ◽

Ethylene Terephthalate ◽

Treatment Time ◽

Alkaline Treatment ◽

Aqueous System ◽

Poly Ethylene Terephthalate ◽

Poly Ethylene ◽

Kinetics Of ◽

Scanning Electron

Poly(ethylene terephthalate) fabrics are treated with sodium hydroxide using ethylene glycol or glycerin as the solvent. Compared with conventional aqueous alkaline hydrolysis, the degradation rate in ethylene glycol increases tenfold. The kinetics of the alkaline-ethylene glycol treatment show that the weight loss is linear with respect to time. The moisture regain rate and tensile properties of the treated fabrics are measured; other tests include scanning electron microscopy and dyeing properties. The results show that the properties of the treated fabrics do not depend significantly on the solvent; therefore, using ethylene glycol can greatly shorten the treatment time to achieve results similar to those with the conventional aqueous system.

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Dynamic Step-Scan Two-Dimensional Fourier Transform Infrared Studies of Uniaxially Drawn Poly(Ethylene Terephthalate) Film

Applied Spectroscopy ◽

10.1366/0003702963906249 ◽

1996 ◽

Vol 50 (3) ◽

pp. 377-381 ◽

Cited By ~ 26

Author(s):

Masashi Sonoyama ◽

Kunihiro Shoda ◽

Gen Katagiri ◽

Hideyuki Ishida

Keyword(s):

Ethylene Glycol ◽

Phenyl Ring ◽

Ethylene Terephthalate ◽

High Mobility ◽

Two Dimensional ◽

Poly Ethylene Terephthalate ◽

Dynamic Spectra ◽

Infrared Studies ◽

Poly Ethylene ◽

Mechanical Stretching

Dynamic infrared spectra of uniaxially drawn poly(ethylene terephthalate) (PET) under a sinusoidal strain were examined. A very intense dynamic band at 973 cm−1 assigned to the trans C-O stretching mode indicated stress-induced high mobility around the C-O bond in the ethylene glycol units. It was supposed that derivative-like skeletal bands observed in the dynamic spectra originated from the stress-induced frequency shift. Two-dimensional correlation analyses of the dynamic spectra were also carried out and revealed that the phenyl ring 18a band at 1018 cm−1 and the phenyl ring 19b band at 1410 cm−1 were composed of three and two independent components, respectively. The correlation peaks between the phenyl ring and CH2 vibrational modes showed that orientation of the methylene group in the ethylene glycol unit, induced by mechanical stretching, is faster than that of the phenyl ring in the terephthalate unit.

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