| Autor: |
Zahova S; Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria., Tuleshkov P; Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria., Troev K; Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria., Mitova V; Institute of Polymers, Bulgarian Academy of Sciences, Sofia 1113, Bulgaria. |
| Jazyk: |
angličtina |
| Zdroj: |
Molecules (Basel, Switzerland) [Molecules] 2024 Sep 08; Vol. 29 (17). Date of Electronic Publication: 2024 Sep 08. |
| DOI: |
10.3390/molecules29174261 |
| Abstrakt: |
Among polymer wastes, poly(ethylene terephthalate) (PET) is the most important commercial thermoplastic polyester. Less than 30% of total PET production is recycled into new products. Therefore, large amounts of waste PET need to be recycled. We describe a feasible approach for the direct application of the glycolysis products of PET (GP-PET), without further purification, for the synthesis of value-added products. It was established that GP-PET is valorized via phosphorylation with phenylphosphonic dichloride (PPD), as well as with trimethyl phosphate (TMP). When PPD is used, a condensation reaction takes place with the evolution of hydrogen chloride. During the interaction between GP-PET and TMP, the following reactions take place simultaneously: a transesterification with the participation of the hydroxyl group of GP-PET and the methoxy group of TMP and an exchange reaction between the ester group of GP-PET and the methyl ester group of TMP. The occurrence of the exchange reaction was confirmed by 1 H, 31 P, 13 C NMR, and GPC analysis. Thermogravimetric analysis (TGA) revealed that the percentage of a carbon residual (CR) implies the possibility of using the end products as flame retardant (FR) additives, especially for polyurethanes as well as thermal stabilizers of polymer materials or Li-ion cells. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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