Recycling of waste poly(ethylene terephthalate) with castor oil using microwave heating

Beneš, Hynek; Slabá, Jitka; Walterová, Zuzana; Rais, David

doi:10.1016/j.polymdegradstab.2013.08.019

Cited by 28 publications

(13 citation statements)

References 35 publications

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“…Nevertheless, extensive applications of PET cause a large number of solid wastes annually . Although there are several proposed methods for recycling waste PET, it is suggested that chemical glycolysis is the most attractive method as PET waste can easily be decomposed into corresponding monomers or raw chemicals Glycolysis of PET using different alcoholysis agents, such as ethylene glycol (EG), diethylene glycol (DEG), propylene glycol (PG), polyethylene glycol (PEG), tetraethylene glycol (TEG) and neopentyl glycol (NPG), has been widely studied . Pardal and Tersac have compared the reactivity of different glycols in PET glycolysis, including DEG, dipropylene glycol (DPG), glycerol (Gly) and mixtures of these glycols.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of waterborne polyurethane containing PET waste/PPG as soft segment

Fang

Lei

Zhou

et al. 2015

J of Applied Polymer Sci

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Soft drinks poly(ethylene terephthalate) (PET) bottles were depolymerized by glycolysis using a 1 : 3 molar ratio of PET repeating unit to glycols like neopentyl glycol (NPG) and dipropylene glycol (DPG). Further, a series of waterborne polyurethanes (WPUs) was synthesized using pure polypropylene glycol (PPG), and glycolyzed oligoesters/PPG blends in different molar ratios as soft segment. Thermal property of WPU was tested by differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Moreover, viscosity and particle size of WPU were also investigated. The results show that introduction of a certain amount of glycolyzed oligoester to soft segment makes the degree of hard‐soft domain microphase separation smaller, and can also improve thermal stability of WPU. Furthermore, WPUs synthesised from glycolyzed oligoesters and PPG blends possess larger particle size, better particle size distribution, relative lower and more stable viscosity. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42757.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterization of waterborne polyurethane containing PET waste/PPG as soft segment

Fang

Lei

Zhou

et al. 2015

J of Applied Polymer Sci

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“…The key advantage of this method includes the huge availability of the different chemical products which can be obtained with different reagents [6][7][8][9]. Recently, several processes such as alcoholysis, aminolysis, hydrolysis, and glycolysis have been used for PET chemical recycling.…”

mentioning

confidence: 99%

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

Mejjatti¹,

Harit²,

Riahi³

et al. 2014

Express Polym. Lett.

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“…After de-polymerization, the reaction products were aimed for the preparation of polyurethane systems. The general reaction scheme is depicted in Figure 2 [128]. Beneš et al [128] depolymerized PET with castor oil at 230-240°C for 0-2 hours assisted microwaves.…”

Section: Castor Oilmentioning

confidence: 99%

“…The general reaction scheme is depicted in Figure 2 [128]. Beneš et al [128] depolymerized PET with castor oil at 230-240°C for 0-2 hours assisted microwaves. After the reaction was finished, solid residues were removed by vacuum filtration.…”

Section: Castor Oilmentioning

confidence: 99%

“…Further, Fukushima and coworkers [198,201] [11,187,200,210,221]. In addition, glycolysis leads to the formation of undesired cyclic oligomers [128]. The monomers and low molecular weight oligomers obtained from glycolysis of PET were generally used for impaired ap- [175] plications, such as modifiers for PVC or other polymer composites [183,190,208,222].…”

Section: Glycolysismentioning

confidence: 99%

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Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

Geyer¹,

Lorenz²,

Kandelbauer³

2016

Express Polym. Lett.

204

120

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Abstract.Recycling of poly(ethylene terephthalate) (PET) is of crucial importance, since worldwide amounts of PETwaste increase rapidly due to its widespread applications. Hence, several methods have been developed, like energetic, material, thermo-mechanical and chemical recycling of PET. Most frequently, PET-waste is incinerated for energy recovery, used as additive in concrete composites or glycolysed to yield mixtures of monomers and undefined oligomers. While energetic and thermo-mechanical recycling entail downcycling of the material, chemical recycling requires considerable amounts of chemicals and demanding processing steps entailing toxic and ecological issues. This review provides a thorough survey of PET-recycling including energetic, material, thermo-mechanical and chemical methods. It focuses on chemical methods describing important reaction parameters and yields of obtained reaction products. While most methods yield monomers, only a few yield undefined low molecular weight oligomers for impaired applications (dispersants or plasticizers). Further, the present work presents an alternative chemical recycling method of PET in comparison to existing chemical methods.

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Recycling of waste poly(ethylene terephthalate) with castor oil using microwave heating

Cited by 28 publications

References 35 publications

Preparation and characterization of waterborne polyurethane containing PET waste/PPG as soft segment

Preparation and characterization of waterborne polyurethane containing PET waste/PPG as soft segment

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

Recycling of poly(ethylene terephthalate) – A review focusing on chemical methods

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