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通过紫外加速老化试验研究交联聚苯乙烯(CLPS)和CLPS/云母复合材料的抗紫外老化性能。从力学、分子结构及耐热性能等方面探讨云母对CLPS抗紫外老化性能的影响。结果表明,随着辐照时间的延长,CLPS和CLPS/云母复合材料的拉伸强度、冲击强度和弯曲强度均呈下降趋势,CLPS/云母复合材料力学性能的保持率基本都高于CLPS,并且云母含量越大力学性能保持率越高。与CLPS/云母复合材料相比,CLPS在紫外辐照18 d后红外谱图出现明显的C=O吸收峰。热重分析表明,紫外老化后CLPS/云母复合材料的热稳定性能优于CLPS。研究结果证明掺杂云母对交联聚苯乙烯抗紫外老化性能有明显的提高。
The anti-UV aging properties of CLPS and CLPS / mica composites were studied by UV accelerated aging test. From the aspects of mechanics, molecular structure and heat resistance, the effects of mica on the UV aging resistance of CLPS were discussed. The results show that the tensile strength, impact strength and flexural strength of CLPS and CLPS / mica composite composites decrease with the extension of irradiation time, and the retention of mechanical properties of CLPS / mica composites is basically higher than CLPS, and The higher the mica content, the higher the retention of mechanical properties. Compared with the CLPS / mica composite, the CLPS showed obvious C = O absorption peaks after 18 d UV irradiation. Thermogravimetric analysis shows that CLPS / mica composite has better thermal stability than CLPS after UV aging. The results show that doped mica crosslinked polystyrene UV aging resistance significantly improved.