Abstract:To achieve high-value utilization of reed resources, reed-based polyurethane foam (B-PU) was prepared using reed-based polyols containing liquefaction residues and polymeric methylene diphenyl diisocyanate (PAPI) as main raw materials. The effects of isocyanate index, catalyst ratio and dosage, blowing agent content, and foam stabilizer content on the foam properties were investigated. The results show that when the isocyanate index is 1.2, the catalyst mass ratio is 1.5∶1 (P5∶P8), the catalyst mass fraction is 2% , the blowing agent mass fraction is 2% , and the foam stabilizer mass fraction is 4% , the B-PU exhibits a density of 105.2 kg/m3, a compressive strength of 292.5 kPa, and a thermal conductivity of 0.0578 W/(m·K). Due to the synergistic effect of liquefaction residues and phytoliths, the thermal stability of B-PU is superior to that of petroleum-based polyurethane foam. This study provides a theoretical basis for the development of high-performance reed-based polyurethane foam materials.