Synthesis and Characterization of Cerium Oxide/Polyurethane Rigid Foam Composites

Polyurethane rigid foam was prepared by prepolymerization method, and composited with CeO₂ of different particle sizes to prepare cerium oxide/polyurethane rigid foam composites, and the influence of CeO₂ particle size on the properties of CeO₂-based polyurethane rigid foam composites was investigated. When the mass fraction of cerium oxide in polyurethane rigid foam was 16%, the thermal stability and hardness of the composites showed an increasing trend with the decrease of cerium oxide particle size. The cerium oxide nanomodified polyurethane showed enhanced wear resistance and a porosity of 48.7%.To evaluate the application performance of the composite materials, they were applied in the polishing process of liquid crystal glass a machine test was conducted using a 1 μm cerium oxide polishing slurry. The results showed that the polyurethane rigid foam composite containing 5 μm cerium oxide achieved the highest polishing efficiency, but was prone to causing surface scratches.In contrast, the composite with 1 μm cerium oxide exhibited moderate polishing efficiency and yielded an approximate pass rate of 80%.