Thermo-Chemical Decomposition Study of Polyurethane Elastomer Through Glycerolysis Route with Using Crude and Refined Glycerine as a Transesterification Agent

Datta, Janusz; Kopczyńska, Patrycja; Simón, D.; Rodrı́guez, Juan F.

doi:10.1007/s10924-016-0932-y

Cited by 41 publications

(42 citation statements)

References 30 publications

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“…This is very advantageous because it is assumed that glycerolysis products can be used as a reactive component for the production of polyurethane materials [35]. High dispersity (>1.8) could significantly reduce or exclude the use of these raw materials in the production of polyurethanes, which should have an ordered structure and have beneficial properties [36,37]. The functionalities of the obtained oligomerols for compounds based on PLA waste and pure PLA were in the range of 2.82-3.20.…”

Section: Results Of Analytical Testsmentioning

confidence: 99%

Glycerolysis of Poly(lactic acid) as a Way to Extend the “Life Cycle” of This Material

et al. 2019

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The article concerns the use of glycerolysis reaction as an alternative method of processing post-production and post-consumer waste from poly(lactic acid) (PLA). Management of waste is a very important issue from an environmental protection and economic point of view. Extending the “life cycle” of PLA is extremely important because it allows to make the most of this material. It also limits economic losses resulting from its disposal in the biodegradation process at the same time. This paper presents a method of glycerolysis of poly(lactic acid) waste using various amounts of anhydrous glycerol (mass ratio from 0.3 to 0.5 parts by weight of glycerol per 1.0 part by weight of PLA). This process was also carried out for pure, unmodified PLA Ingeo® (from NatureWorks) to compare the obtained results. The six liquid oligomeric polyhydric alcohols were obtained as a result of the synthesis. Then, they were subjected to physicochemical tests such as determination of color, smell, density, viscosity, and pH. In addition, the obtained raw materials were subjected to analytical tests such as determination of the hydroxyl value, acid value, water content, and elemental composition. The average molecular weights and dispersity were also tested by gel permeation chromatography (GPC). The assumed chemical structure of the obtained compounds was confirmed by spectroscopic methods such as FTIR, 1H NMR, 13C NMR. Glycerolysis products were also subjected to differential scanning calorimetry (DSC) to determine thermal parameters. The obtained research results have allowed the precise characterization of newly obtained products and determination of their suitability, e.g., for the synthesis of polyurethane (PUR) materials.

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Section: Results Of Analytical Testsmentioning

confidence: 99%

Glycerolysis of Poly(lactic acid) as a Way to Extend the “Life Cycle” of This Material

et al. 2019

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“…Landfilling is still the most common way to process polyurethane waste. The fraction of PU’s disposed this way reaches almost 50% of waste, (combined postconsumer or postproduction ones) [ 20 ]. As the polyurethane foams have the greatest share of production, they also are the biggest problem.…”

Section: Polyurethane Waste Managementmentioning

confidence: 99%

Polyurethane Recycling and Disposal: Methods and Prospects

2020

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Growing water and land pollution, the possibility of exhaustion of raw materials and resistance of plastics to physical and chemical factors results in increasing importance of synthetic polymers waste recycling, recovery and environmentally friendly ways of disposal. Polyurethanes (PU) are a family of versatile synthetic polymers with highly diverse applications. They are class of polymers derived from the condensation of polyisocyanates and polyalcohols. This paper reports the latest developments in the field of polyurethane disposal, recycling and recovery. Various methods tested and applied in recent years have proven that the processing of PU waste can be economically and ecologically beneficial. At the moment mechanical recycling and glycolysis are the most important ones. Polyurethanes’ biological degradation is highly promising for both post-consumer and postproduction waste. It can also be applied in bioremediation of water and soil contaminated with polyurethanes. Another possibility for biological methods is the synthesis of PU materials sensitive to biological degradation. In conclusion, a high diversity of polyurethane waste types and derivation results in demand for a wide range of methods of processing. Furthermore, already existing ones appear to be enough to state that the elimination of not reprocessed polyurethane waste in the future is possible.

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“…The purpose of chemical recycling is to recover and reuse monomers [14]. This method is used for polyamides as well as polyurethanes [14][15][16] and polyesters [17,18]. The reactivity of polyamides depends on the polar amide groups present in the main polyamide chain, which can react with decomposing agents.…”

Section: Introductionmentioning

confidence: 99%

A New Approach to Chemical Recycling of Polyamide 6.6 and Synthesis of Polyurethanes with Recovered Intermediates

et al. 2018

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A new efficient method for the chemical decomposition of polyamide 6.6 by the glycolysis and amino-glycolysis processes was proposed. The glycolysis was conducted using the mass excess of ethylene glycol (EG) as a decomposing agent in the presence of a catalyst. Also, a mixture of EG and triethylenetetramine was used as another decomposing agent in the aminoglycolysis process. The described process of decomposition did not require the use of elevated pressure. The hydroxyl and amine numbers, rheology behavior and the presence of characteristic chemical groups in the obtained glycolysates and aminoglycolysates were determined in order to characterize the reaction products. The decomposition products were defined as non-Newtonian fluids that could be described by suitable mathematical models. The conducted studies showed that the properties of the obtained intermediates depend on the mass excess of the decomposing agent used. The resulting semiproducts are suitable for reusing in the synthesis of polyurethanes, which has been confirmed by the exemplary synthesis. In the reaction, 10 and 15 wt% of commercial polyol were replaced with the recovered intermediates.

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Thermo-Chemical Decomposition Study of Polyurethane Elastomer Through Glycerolysis Route with Using Crude and Refined Glycerine as a Transesterification Agent

Cited by 41 publications

References 30 publications

Glycerolysis of Poly(lactic acid) as a Way to Extend the “Life Cycle” of This Material

Glycerolysis of Poly(lactic acid) as a Way to Extend the “Life Cycle” of This Material

Polyurethane Recycling and Disposal: Methods and Prospects

A New Approach to Chemical Recycling of Polyamide 6.6 and Synthesis of Polyurethanes with Recovered Intermediates

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