| Autor: |
Jutrzenka Trzebiatowska, Patrycja, Dzierbicka, Agata, Kamińska, Natalia, Datta, Janusz |
| Předmět: |
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| Zdroj: |
Polymer International; Oct2018, Vol. 67 Issue 10, p1368-1377, 11p |
| Abstrakt: |
Chemical recycling is the most favourable recycling method due to the possibility of polyol recovery. This work is dedicated to the utilisation of crude glycerine and polyurethane waste. It aims at determining the impact of the use of glycerine from the production of biodiesel with various degrees of purity as a cleavage agent on the decomposition process of polyurethane foam. The influence of glycerine purity on the chemical structure of recycling products was analysed using Fourier transform infrared and 1H NMR spectroscopies and gel permeation chromatography. Hydroxyl and amine values were determined, and rheological measurements were performed. Glycerolysates showed minor structural differences due to the presence of amine groups and exhibited heterogeneous structure compared to original polyols. The ones obtained in decomposition using 84 and 99.5% glycerine had a lower viscosity below 0.45 Pa s at 50 °C and higher hydroxyl number of 183 and 220 mg KOH g−1, respectively, compared to the ones obtained with glycerine purity of 40 and 62% due to a different chemical structure. All of the products of decomposition were defined as non‐Newtonian fluids, where viscosity depended on the shear rate. Selected glycerolysates were used in the production of cast polyurethanes with satisfactory mechanical properties. © 2018 Society of Chemical Industry [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
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