Chemical recycling of PET using neopentyl glycol: Reaction kinetics and preparation of polyurethane coatings

Kathalewar, Mukesh; Dhopatkar, Nishad; Pacharane, Bajirao; Sabnis, Anagha; Raut, P.P.; Bhave, V. G.

doi:10.1016/j.porgcoat.2012.08.023

Cited by 58 publications

(42 citation statements)

References 14 publications

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“…PET waste can be depolymerized by transesterification using various agents, such as water (hydrolysis), acids or bases [7,8], alcohols (alcoholysis) [9][10][11], amines (aminolysis) [12], and glycols (glycolysis) [13][14][15][16]. Raw or purified materials obtained in that way can be used for the synthesis of a polyester resins [17][18][19], epoxy resins [20,21], polyurethane resins [22][23][24], and alkyd resins [25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

et al. 2015

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Unsaturated polyester resin (UPe)-based nanocomposites and fumed silica Aerosil R812S, R805 and R816, and R200 modified with phenyl terminal group, R200NPh, were prepared. UPe resins were synthesized from maleic anhydride and products of glycolysis, obtained by polyethylene terephthalate depolymerization with dipropylene glycol in the presence of tetrabutyl titanate catalyst. The obtained unsaturated polyesters were characterized by acid, hydroxyl, and iodine values and by FTIR and NMR analysis. The microstructural analysis of the prepared nanocomposites, performed by using transmission electron microscopy, confirmed that silica nanoparticles formed chain-like aggregates in the polymer matrix. The presence of modified silica nanoparticles had no influence on the glass transition temperature and thermal stability of polyester matrix.

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Section: Introductionmentioning

confidence: 99%

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

et al. 2015

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“…The monomers or higher oligomers obtained can be used as building blocks to synthesize other polymers with higher economical values. For example, saturated and unsaturated polyesters [10][11][12], polyurethanes [13][14][15], coating materials [16][17][18][19] and additives [20][21][22] have been synthesized from such building blocks in recent years. A large number of reagents have been used for glycolysis of PET such as ethylene glycol [23][24][25][26], diethylene glycol [27,28], propylene glycol [29], neopentyl glycol [14], 1,4-butanediol [30,31], and some synthetic oligoesters [32,33].…”

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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“…These reaction products were used for the synthesis of copolymers containing polyester species. Additionally, a consecutive separation and purification of the obtained products was necessary [175,182,194]. Another parameter for PET-glycolysis is the application of a catalyst.…”

Section: Glycolysismentioning

confidence: 99%

“…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]. Further, these glycolyized products were applied for synthesis of co-polymers of undefined composition [174,179,181,182,194,219].…”

Section: Glycolysismentioning

confidence: 99%

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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Chemical recycling of PET using neopentyl glycol: Reaction kinetics and preparation of polyurethane coatings

Cited by 58 publications

References 14 publications

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

Effect of the modified silica Nanofiller on the Mechanical Properties of Unsaturated Polyester Resins Based on Recycled Polyethylene Terephthalate

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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