学术论文

      EPDM橡胶海洋大气环境室内外表观老化性能的对比研究

      Comparative study on indoor and outdoor apparent aging properties of EPDM in the marine atmospheric environment

      摘要:
      采用光泽度、扫描电镜和傅里叶变换红外分析技术等研究了三元乙丙橡胶(EPDM)在西沙大气暴晒和室内加速老化试验条件下的表观形貌及结构的变化,探索了室内外老化表观性能的相关性.结果表明:盐雾试验条件下光泽度基本没有变化;荧光紫外试验中光泽度在开始阶段就快速下降,最后趋于平稳;在西沙大气暴晒条件下,初始阶段变化趋势并不明显,随着老化时间的增加,光泽度值下降.紫外-盐雾复合循环试验条件下光泽度变化趋势与西沙大气条件下相似,说明西沙大气暴晒试验和紫外-盐雾复合循环试验具有很好的相关性,基于光泽度分析,紫外-盐雾复合循环试验的加速倍数是25~26.红外光谱显示在西沙大气暴晒试验和紫外-盐雾复合试验中可能有β-二酮的生成,盐雾试验条件下没有β-二酮的生成.
      Abstract:
      Morphological and structural changes of ethylene-propylene-diene monomer(EPDM) in indoor-accelerated aging test and atmospheric exposure test were investigated by gloss meter,scanning electron microscopy(SEM) and Fourier transform infrared spectroscopy(FTIR).Correlation analysis was applied to discuss the outdoor and indoor apparent aging properties of EPDM.The results show that the gloss does not change in salt-fog test.In fluorescent UV test,the gloss decreases rapidly in the initial stage of aging and then reaches a plateau.The gloss changes inconspicuously in the initial stage of aging and then decreases with the aging time prolonging in atmospheric exposure test in the Xisha islands.The trend of gloss in indoor UV and salt-fog composite circulation experiment is similar to atmospheric exposure test in the Xisha islands.Atmospheric exposure test in the Xisha islands and indoor UV and salt-fog composite circulation experiment have a better correlation.Based on the analysis of gloss,the accelerated aging multiple of indoor UV and salt-fog composite circulation experiment is 25 to 26.FTIR spectra imply that β-diketone may form after EPDM is exposed to the artificial weathering environment produced by indoor UV and salt-fog composite circulation experiment and atmospheric exposure test in the Xisha islands.β-diketone is not formed in the salt-fog test condition.
      作者: 杨璇 [1] 高瑾 [1] 李晓刚 [1] 田建永 [1] 林琳 [2]
      作者单位: 北京科技大学材料科学与工程学院,北京100083/北京市腐蚀、磨蚀与表面技术重点实验室,北京100083 大庆职业学院,大庆,163311
      刊 名: 北京科技大学学报 ISTICEIPKU
      年,卷(期): 2011, 33(10)
      分类号: TQ333.4
      机标分类号: X83 X51
      在线出版日期: 2012年4月21日
      基金项目: 国家自然科学基金资助项目,科技部科学条件平台建设项目