Investigation of the thermal conversion behavior and reaction kinetics of the pyrolysis of bio-based polyurethane: A reference study

In view of the global objective carbon neutrality, using natural biomaterials to prepare bio-based polyurethane (BPU) is a significant means reducing our heavy dependence on fossil fuels. If utilization these increase, appropriate treatment methods after they reach end their life cycle are challenge that must be addressed in advance. present study, thermogravimetric (TG) experiments were conducted for as reference case compared neat (NPU) from resources. The resultant generation pyrolysis products was analyzed coupled analysis, Fourier-transformed infrared spectroscopy and gas chromatography mass spectrometry (TG-FTIR-GC/MS). reaction kinetics investigated three model-free by Flynn–Wall–Ozawa (FWO), Kissinger–Akahira–Sunose (KAS), Starink, addition model-fitting Coats–Redfern (CR) method. TG analysis indicated decomposition BPU NPU can divided into similar stages with temperature ranges <200 °C, 220–450/500 °C above 500 °C. Activation energies (Ea) conversion fell range 149.4–221.0 kJ mol−1 95.6–162.6 respectively when methods. apparent mechanism study revealed both samples accordance order models, orders 3 2.5 NPU.