“…The rest of levoglucan and carbon fragments would convert to smaller fragments of lower molecular weight (alkenes, aldehydes, alcohols, etc.) through decomposition, reorganization, dehydration, and decarbonization 53,68,71 . When the temperature reaches 400°C, an aromatic structure is generated through polymerization, intramolecular condensation and aromatization of alkene and aldehyde on adjacent fibers, facilitating the development of cross‐linked structures 68 .…”