Glycolyzed products from PET waste and their application in synthesis of polyurethane dispersions

Cakić, Suzana; Ristić, Ivan; M-Cincović, Milena; Nikolić, Nada Č.; Ilić, Olivera Z.; Stojiljković, Dragan T.; B-Simendić, Jaroslava K.

doi:10.1016/j.porgcoat.2011.11.024

Cited by 57 publications

(34 citation statements)

References 29 publications

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“…PUD are prepared by anionic dispersion process (Cakić et al, 2011), using IPDI, glycolyzed products, DMPA as potential ionic center which allow water dispersibility and ethylene dimine (EDA) as chain extender. …”

Section: Water-based Pud Based On Glycolized Products Obtained From Rmentioning

confidence: 99%

“…The obtained glycolyzed oligoester polyols were analysed by the hydroxyl value (HV) determination according to the conventional acetic anhydride/pyridine method (Cakić et al, 2011). The hydroxyl value of the oligoester polyol obtained in the glycolysis reaction based on molar ratio of PET repeating unit to glycol, 1:2, with PG was HBPG=490 mg KOH/g, TEG HBTEG=370 mg KOH/g and PEG HBPEG400=297 mg KOH/g.…”

Section: Example 2 Of Glycolysis Reactionmentioning

confidence: 99%

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Thermal Analysis of Polyurethane Dispersions Based on Different Polyols

Cakić¹,

Ristić²,

Ristić³

2012

Polyurethane

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Section: Water-based Pud Based On Glycolized Products Obtained From Rmentioning

confidence: 99%

Section: Example 2 Of Glycolysis Reactionmentioning

confidence: 99%

Thermal Analysis of Polyurethane Dispersions Based on Different Polyols

Cakić¹,

Ristić²,

Ristić³

2012

Polyurethane

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“…The PET bottles are discarded in huge quantities, originating a serious ecologic problem because they accumulate in the environment, such as, sewer system obstruction and its accumulation in green areas prevents the natural growth of plants. Therefore, there is a growing interest in recycling PET by degradation as a partial solution to the solid waste problem, PET waste degradation consists of the decomposition by chemical agents to obtain monomers and oligomers as raw materials for the syntheses of polyesters or employed as precursors for high molecular weight polyurethanes 1 , polyester 2 and other specific uses 3 . PET can be recycled by chemical depolymerization using diols, alcohols, water and even ethanolamine 4,5 and diethanolamine as depolymerizing agents 6 .…”

Section: Introductionmentioning

confidence: 99%

Degradation of Poly(ethyleneterephtalate) Waste to Obtain Oligomers Using a Zinc Complex as Catalyst

Ovalle-Sánchez

Elizondo-Martínez

Pérez-Rodríguez

et al. 2017

J. Chil. Chem. Soc.

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Thermal degradation of Poly(ethylene terephthalate) (PET) bottles waste was carried out by glycolysis using triethyleneglycol (TEG) as nucleophilic agent and N 1 ,N 2 -bis(2-aminobenzyl)-1,2-diaminoethane zinc(II) (ABEN), in order to test this compound as catalyst in the degradation of PET until to obtain short chains of polyester (oligomers). The depolymerization processes was tested at 180, 190 and 210 °C, and two molar ratios of PET:TEG (1:1.3 and 1:2.6), the amount of catalyst used was fixed at 1% in relation to PET, the best experiment of PET glycolysis was found at 190 °C during two hours in a mass relation PET:TEG 1:1.3. All products were analyzed by Fourier transform infrared spectroscopy (IR), gel permeation chromatography (GPC) and differential scanning calorimetry (DSC), the behavior of the reaction rate was studied for the best experiment by measuring the amount of degraded PET at different glycolysis time. The degradation of PET was favored with the use of ABEN, which accelerates the reaction, obtaining oligomers in the absence of an organic solvent or reaction medium, this is the most efficient catalyst found so far. The oligomers were obtained with molecular weight between 900 and 1500 g mol -1 depending on the reaction time, 60 min was the less time of the total glycolysis of PET. Also was found that the molecular weight of the oligomers increased along the glycolysis, due to the recombination with TEG and ethylene glycol produced in degradation.

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“…This process involves the solvolytic cleavage of PET chains by using diverse glycols to give the so called glycolyzates consisted of monomers for the repolymerization of PET (bis (hydroxyalkyl) terephthalate) and/or oligomers. Ethylene glycol (EG) is the most usually used solvent in PET glycolysis [10][11][12], but also diethylene glycol (DEG) [13], triethylene glycol (TEG) [14], propylene glycol (PG) [15] or dipropylene glycol (DPG) [16]. Research efforts have been aimed in three directions.…”

Section: Introductionmentioning

confidence: 99%

High performance alkyd resins synthesized from postconsumer PET bottles

et al. 2015

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The glycolytic recycling of waste PET presents a challenge for the production of secondary value-added products, such as alkyd resins. A way to overcome unsatisfactory mechanical, drying and chemical resistance properties met with alkyds obtained from difunctional glycolyzates, was proposed. Waste PET was glycolyzed using multifunctional alcohols: glycerol (G), trimethylolethane (TME), trimethylolpropane (TMP) and pentaerythritol (PE), giving tetra-and hexa-functional glycolyzates and, for comparison, using diethylene glycol (DEG), propylene glycol (PG) and dipropylene glycol (DPG) giving di-functional glycolyzates. The obtained glycolyzates were examined by 1 H and 13 C NMR, FTIR spectroscopy and elemental analysis and further used in the synthesis of alkyd resins. The properties of the prepared alkyd resins (acid, hydroxyl and iodine values, color, average molar masses and molar mass distributions, viscosity, drying time, hardness, flexibility, gloss, adhesion and chemical resistance) were investigated with respect to the functionality and the structure of the used glycolyzates. Alkyd resins derived from multifunctional glycolyzates (TME and TMP) showed considerably enhanced properties compared to those produced from difunctional glycolyzates and also to conventional general purpose resins.Please do not adjust margins Please do not adjust margins decreased the branching degree. Future work on this matter will involve the preparation, analysis and application of lacquers, paints and anticorrosive coatings based on the presented alkyd resins.

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Glycolyzed products from PET waste and their application in synthesis of polyurethane dispersions

Cited by 57 publications

References 29 publications

Thermal Analysis of Polyurethane Dispersions Based on Different Polyols

Thermal Analysis of Polyurethane Dispersions Based on Different Polyols

Degradation of Poly(ethyleneterephtalate) Waste to Obtain Oligomers Using a Zinc Complex as Catalyst

High performance alkyd resins synthesized from postconsumer PET bottles

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