交联聚苯乙烯/云母复合材料抗紫外老化性能研究

Performance of Ultraviolet Aging Resistance of Cross-linked Polystyrene/Mica Composites

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 UV aging resistance of the cross-linked polystyrene（CLPS） and CLPS/mica composites were comparatively studied. The results showed that the tensile strength and impact strength of the CLPS and the CLPS/mica composites decreased with the increasing irradiation time, but the retention rate of the tensile strength and impact strength of the CLPS/mica composites were substantially higher than that of CLPS, the higher mica content, the higher retention ratio. Infrared analysis showed that the CLPS had significant C=O absorption peaks in IR spectrum after irradiation for 18 days. Thermal gravimetric analysis showed that the thermal property of the CLPS/mica were better than the pure CLPS after UV aging. It was proved that mica could improve UV aging properties of the cross-linked polystyrene.