Thermogravimetric Analysis Investigation of Polyurethane Plastic Thermal Properties Under Different Atmospheric Conditions

Abstract

Recycling and energy recovery of waste plastic are major categories of modern solid waste management systems. Since the lower heating values of plastics are around 30 MJ/kg, equivalent to traditional solid fuels, such as petroleum coke, coal and charcoal, waste plastics are considered as potential fossil fuels alternatives in various industrial sectors. Already nowadays, energy recovery of waste plastic is typically conducted by combustion in incinerators or cement kilns. However, due to various types of waste plastics, their thermochemical behaviour has been rarely investigated. Even more, the thermochemical behaviour of waste plastics under oxy-combustion conditions has even rarely been studied. In this study non-isothermal thermogravimetric analyser was used to study the thermochemical behaviour of polyurethane plastic waste under seven different atmospheric conditions. Polyurethane decomposition kinetic constants have been estimated by the simultaneous evaluations of seven weight loss curves measured for the heating rate of 20 K/min and a final temperature of 1,073 K. The obtained results showed that the combustion of polyurethane is mainly composed of two stages, and the higher oxygen concentration slightly influenced the first stage but highly accelerates the second

Synthesis of porous hydroxyapatite scaffolds from waste cockle shells by polyurethane sponge replication method

“…Thus, the the ester bond (Trovati et al, 2010). The low of first decomposition temperature in this study (<400 o C) occurred because the sponge thermal treatment process was carried out under atmospheric conditions (Mikulcic et al, 2019). After the heat treatment process, the PU will decompose to leave a relatively round pore as shown in Figure 3.…”

Performance characterization and pyrolysis kinetics of graphene-reinforced, green rigid polyurethane foam

“…Figures 15(A) and (B) show that the maximum thermal loss focus of the PU foam continues to shift to the high-temperature zone with the increase of the heating rate; the higher the heating rate, the shorter the reaction time and the lower the reaction degree of the PU foam, as it affects the internal heat transfer of the regenerated PU foam. This shows that the DTG curve shifts to the high-temperature zone [39].…”

Ecofriendly automobile base coats derived from castor oil: evaluation of nano silica reinforcements on the performance characteristics of coatings

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