This study aimed to address the deficiencies in weather resistance and processability of polycarbonate (PC, (C16H14O3)n). Polymethylsilsesquioxane (PMSQ) microspheres were synthesized via a one-step hydrolysis-polycondensation method. Subsequently, a cerium oxide@polymethylsilsesquioxane (CeO2@PMSQ) core-shell structure was fabricated through chemical precipitation technology, enabling the compounding of rare-earth oxides and siloxane polycarbonate (Si-PC). The microstructure, mechanical properties, thermal stability, and UV-shielding performance of the composites were systematically investigated. The results indicated that when the addition amount of CeO2@PMSQ was 0.5%, the tensile strength of the composite remained at 35 MPa, the limiting oxygen index (LOI) reached 28.5%, and the UV absorption rate increased by 30%. Compared with existing modification methods, this study achieved synergistic improvement of multiple properties without sacrificing mechanical performance, providing theoretical and technical support for the industrial application of special engineering plastics.
Wang et al. (Wed,) studied this question.