深入研究聚乙烯滚塑专用料在不同条件下的耐候性能，全面了解其结构和性能的变化规律。使用扫描电子显微镜（SEM）、红外光谱仪（FTIR）、差示扫描量热仪（DSC）等表征手段研究不同氙灯老化程度下聚乙烯滚塑专用料的结构与性能。结果表明：随着氙灯老化时间的增加，滚塑料的表面形貌发生明显变形和裂纹，同时内部羰基特征峰的强度也呈现增大趋势。氙灯老化引起滚塑料氧化诱导期显著缩短，然而，滚塑料在熔融、结晶温度和加工性能方面表现出相对稳定的特性。此外，滚塑料的屈服应力升高，而断裂应变、断裂应力和拉伸强度则呈下降趋势。研究结果为了解聚乙烯滚塑专用料的耐候性能提供详细的实验数据，为进一步优化产品性能和应用提供参考。

The study was to thoroughly investigate the weather resistance of polyethylene for rotational molding under different conditions, and to comprehensively understand the changing rules of their structure and performance. The structure and properties of polyethylene rotational molding special materials were investigated under different xenon lamp aging levels by using scanning electron microscopy (SEM), infrared spectroscopy (FTIR), differential scanning calorimetry(DSC), and other characterization methods. The results show that with the increase of xenon aging time, the surface morphology of the rotational plastic undergoes significant deformation and cracking, while the intensity of the internal carbonyl characteristic peaks also shows an increasing trend. The xenon lamp aging causes a significant shortening of the oxidation induction period of the rotational plastics. However, the rotational plastics show relatively stable characteristics in terms of melting and crystallization temperatures and processing properties. In addition, the yield stress of the rotational plastics increases, while the strain at fracture, stress at break and tensile strength show a decreasing trend. The experimental data in this study provide detailed information on the weather resistance of polyethylene for rotational molding, offering references for further optimizing product performance and applications.