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 polyurethanes waste. It aims at determining the impact of the use of glycerine from the production of biodiesel with various purity degrees 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 by FTIR, 1H NMR and GPC. Hydroxyl and amine values were determined, and rheological Prada Bags Replica 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 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.This article is protected by copyright. All rights reserved.

» Author: PatrycjaJutrzenka Trzebiatowska, AgataDzierbicka, NataliaKami?ska, JanuszDatta

» Reference: doi:10.1002/pi.5638

» Publication Date: 30/05/2018

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