Unsaturated polyester resin via chemical recycling of off-grade poly(ethylene terephthalate)

2009 ◽  
Vol 58 (9) ◽  
pp. 1084-1091 ◽  
Author(s):  
Ali Reza Zahedi ◽  
Mehdi Rafizadeh ◽  
Seyed Reza Ghafarian
Keyword(s):  
Ethylene Terephthalate ◽  
Polyester Resin ◽  
Unsaturated Polyester ◽  
Unsaturated Polyester Resin ◽  
Chemical Recycling ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

Synthesis and sizing performances of water-soluble polyester based on bis(2-hydroxyethyl) terephthalate derived from depolymerized waste poly(ethylene terephthalate) fabrics

2018 ◽  
Vol 89 (4) ◽  
pp. 572-579 ◽  
Author(s):  
Jing Lu ◽  
Mengjuan Li ◽  
Yanyan Li ◽  
Xiaoqiang Li ◽  
Qiang Gao ◽  
...  
Keyword(s):  
Surface Tension ◽  
Fourier Transform ◽  
Ethylene Terephthalate ◽  
Water Soluble ◽  
Chemical Recycling ◽  
Step Method ◽  
Pet Fabric ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene ◽  
Viscosity Stability

This work aimed at effective chemical recycling of waste poly(ethylene terephthalate) (PET) fabrics into water-soluble polyester (WSP). For this, PET fabric waste was depolymerized using excess ethylene glycol (EG) in the presence of zinc acetate as catalyst. The glycolysis product of PET, bis(2-hydroxyethyl) terephthalate (BHET) was then used to synthesize WSP by a three-step method, that is, transesterification, esterification and polycondensation. The structures of BHET and WSP were identified by Fourier transform infrared spectra. Sizing performances of WSP were studied, and it was found that the surface tension of WSP size (57 mN/m, 22℃, 0.5% of weight) was lower than common sizes, the viscosity of WSP size was 1–2 mPa·S (95℃, 6% of weight) and the viscosity stability was larger than 90% at this temperature. The mixture of WSP and starch showed stronger adhesion to polyester–cotton roving and polyester roving than onefold starch. K/ S values of fibers before sizing and after desizing showed a slightly difference, which indicated that WSP would not influence the color of yarns when used as the sizing agent.

Chemical Recycling of Poly(Ethylene Terephthalate) Using a New Hybrid Process

2008 ◽  
Vol 41 (9) ◽  
pp. 923-928 ◽  
Author(s):  
Bo-kyung Kim ◽  
Dongpil Kim ◽  
Youngmin Cho ◽  
Myungwan Han
Keyword(s):  
Ethylene Terephthalate ◽  
Hybrid Process ◽  
Chemical Recycling ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene

scholarly journals Chemical recycling of poly(ethylene terephthalate). Application to the synthesis of multiblock copolyesters

2014 ◽  
Vol 8 (8) ◽  
pp. 544-553 ◽  
Author(s):  
A. El Mejjatti ◽  
T. Harit ◽  
A. Riahi ◽  
R. Khiari ◽  
I. Bouabdallah ◽  
...  
Keyword(s):  
Ethylene Terephthalate ◽  
Chemical Recycling ◽  
Poly Ethylene Terephthalate ◽  
Poly Ethylene
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