紫外线和盐雾腐蚀对拉挤成型复合材料FRP性能的影响研究.doc

紫外线和盐雾腐蚀对拉挤成型复合材料（FRP）性能的影响研究 摘 要 拉挤成型复合材料(拉挤玻璃钢)应用领域日益广泛，已成为地铁三轨防护系统的绝缘防护罩最佳选择，地铁（尤其隧道外部分）受日光照射、雨淋、污秽等环境因素影响严重。运用1000小时UV老化试验和盐雾腐蚀试验，之后将测试后的试件互换再次进行1000小时UV老化试验和盐雾腐蚀试验并测试，模拟自然环境老化因素，通过对力学性能、电气性能实验数据的研究和分析，为使用寿命评估提供了一定的依据。结果表明：耐冲击电压和泄漏电流均在紫外线照射表面漏纱和损伤后，再经盐雾侵蚀，电性能衰减最严重。而力学性能在盐雾35℃和UV60℃温度下，树脂充分固化,1000小时之内力学性能增强。随着进一步的加速老化，尤其盐雾腐蚀后再经紫外线照射，各项性能衰减最为严重。 关键词 复合材料；拉挤玻璃钢；UV老化；盐雾腐蚀；力学性能；电气性能；加速老化 Study on the Effects of UV and Salt Spray Corrosion on the Performance of Pultruded Composites (FRP)  ABSTRACT: Pultruded composites (FRP) were applied more widely, and has been the best choice for the insulation protection shield of the third track subway system, the MTR (especially outside the tunnel sections) by sunlight, rain, filth and other environmental factors seriously affected. 1000 hours aging test in the UV and salt spray corrosion test, after test samples after 1000 hours UV swap again aging test and salt spray corrosion test, simulate natural aging factors on mechanical properties, electrical performance test research and analysis of data for life provides a basis for evaluation. The results showed that the impact of voltage and leakage current resistance to both UV irradiation and damage the surface of yarn after the leak, and then by salt spray corrosion, electrical properties of the most serious decay. The mechanical properties of the salt spray and UV60 ℃ 35 ℃ temperatures, the resin to fully cure, and the mechanical properties within 1000 hours increased. With further accelerated aging, especially after exposure to ultraviolet light, salt spray corrosion, the performance degradation was the most serious. Key words: Composites; Pultruded FRP; UV aging; Salt spray corrosion; Mechanical properties; Electrical properties; Accelerated aging 1 引 言 复合材料具有良好的绝缘性能、电性能和力学性能以及抗微生物附着性能。广泛的应用于多个领域，因而也是地铁三轨防护系统的绝缘防护罩的理想材料。但在隧道外由于受日光、雨淋、风化等腐蚀严重，其耐老化性能尤为重要，材料在使用过程中会遇到老化的问题。为评价复合材料的耐老化性能，有两类老化试验方法：一类是自然老化试验方法，即直接利用自然环境进行的老化试验；另一类是人工加速老化试验方法，即在实验室利用老化箱模拟自然环境条件的某些老化因素进行的老化试验。由于老化