9 research outputs found
Biopolyols obtained via crude glycerol-based liquefaction of cellulose: their structural, rheological and thermal characterization
Morphology and the physical and thermal properties of thermoplastic polyurethane reinforced with thermally reduced graphene oxide
In this study, thermally reduced graphene oxide (TRG)-containing polyurethane nanocomposites were obtained by the extrusion method. The content of TRG incorporated into polyurethane elastomer systems equaled 0.5, 1.0, 2.0 and 3.0 wt%. The morphology, static and dynamic mechanical properties, and thermal stability of the modified materials were investigated. The application of TRG resulted in a visible increase in material stiffness as confirmed by the measurements of complex compression modulus (E′) and glass transition temperature (Tg). The Tg increased with increasing content of nanofiller in the thermoplastic system. The addition of thermally reduced graphene oxide had a slight effect on thermal stability of the obtained materials. The incorporation of 0.5, 1.0, 2.0 and 3.0 wt% of TRG into a system resulted in increased char residues compared to unmodified PU elastomer. Also, this study demonstrated that after exceeding a specific amount of TRG, the physicomechanical properties of modified materials start to deteriorate
Pyrolysis of polyurethane foams - the analysis of gaseous products of decomposition
Celem pracy była analiza gazowych produktów powstających w wyniku pirolizy. Porównano masy poszczególnych frakcji powstających w procesie, ich ciepła spalania oraz przeprowadzono analizę składu gazu pirolitycznego. Badania wykonano stosując termograwimetr z analizą produktów w podczerwieni oraz laboratoryjny reaktor pirolityczny o objętości 3 dm3, a maksymalna temperatura wynosiła 900 °C. Otrzymany w 500°C produkt gazowy o wartości opałowej ok. 30 MJ/kg zawierał znaczne ilości wodoru i metanu i nadawał się jako paliwo.The aim of this work was to analyze the poly-urethane pyrolysis products including their mass, heating values and pyrolytic gas composition. Experiments were performed in a tubular batch reactor i of 3 dm3 capacity and at maximal process temperature of 900°C. The combination of thermogravimetric and IR analysis was used. The gaseous product obtained at 500°C with a calorific value of app. 30 MJ/kg evolved towards the composition with a high amount of hydrogen and methane, making gases suitable for the use as a fuel