【摘要】 针对铁路非隧道路段聚氨酯弹性垫板侧面龟裂问题开展系统性分析研究与解决。通过现场调研、室内外对比试验及氙灯加速老化试验验证等方法，揭示了太阳光辐照是导致龟裂现象的主要诱因。基于此，提出在配方中添加耐氙灯防老剂的解决方案，试验证明添加1.0%～1.5%耐氙灯防老剂不仅能有效抑制龟裂问题，还能确保产品各项性能指标完全符合现行技术标准要求。本研究成果为提升聚氨酯弹性垫板的耐候性能提供了理论依据和技术支撑，对促进聚氨酯弹性材料在铁路行业的长期可靠应用具有重要实践意义。更多还原

【Abstract】 Systematic analysis and research are implemented aiming at the side crazing problem of PU elastic pads in the non-tunnel railway line sections. On-site investigation, indoor and outdoor comparative experiments and xenon lamp accelerated aging test reveal that solar radiation account for the pad side cracking. In this case, a solution is proposed to add xenon-arc-resistant antiager to the formula. The experiment proves that adding 1.0% to 1.5% xenon-arc-resistant antiager can not only effectively suppress the crazing, but also ensure that all performance indicators of the product fully meet the requirements of existing technical standards. The research results provide a theoretical basis and technical support for improving the weather resistance of polyurethane elastic pads, and have important practical significance for promoting the long-term reliable application of polyurethane elastic materials in railway sector.更多还原