王云英, 张建明, 孟江燕. 聚硫密封胶与氟硅密封胶人工加速老化研究[J]. 南昌航空大学学报(自然科学版), 2010, 24(2): 46-49.
引用本文: 王云英, 张建明, 孟江燕. 聚硫密封胶与氟硅密封胶人工加速老化研究[J]. 南昌航空大学学报(自然科学版), 2010, 24(2): 46-49.
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WANG Yun-ying, ZHANG Jian-ming, MENG Jiang-yan. Study on Aeronautical Sealants after Artificial Accelerated Aging[J]. Journal of nanchang hangkong university(Natural science edition), 2010, 24(2): 46-49.
Citation: WANG Yun-ying, ZHANG Jian-ming, MENG Jiang-yan. Study on Aeronautical Sealants after Artificial Accelerated Aging[J]. Journal of nanchang hangkong university(Natural science edition), 2010, 24(2): 46-49.
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聚硫密封胶与氟硅密封胶人工加速老化研究

Study on Aeronautical Sealants after Artificial Accelerated Aging

    摘要
  • 摘要: 文章研究航空用聚硫密封胶(XM-22B、XM-23)与氟硅密封胶(FVMQ)的人工加速老化行为.对XM-22B和FVMQ试样进行热空气老化、对XM-23试样进行氙灯老化,对密封胶的表面形貌及力学性能进行测试分析,用FT-IR分析密封胶老化前后化学基团特征峰的变化.研究表明:密封胶老化前后的光泽度变化不大;老化28d后,密封胶的拉伸强度随老化时间的延长变化不明显,XM-22B热空气老化和FVMQ热空气老化试样的拉伸强度分别升高了2%和5%,XM-23氙灯老化的拉伸强度降低了3%;无论是热空气老化还是氙灯老化,密封胶的邵尔A硬度均有所增大,XM-22B、XM-23和FVMQ试样的硬度分别增大了15%、23%和11%;红外光谱分析表明氤灯老化28d后,XM-23没有发生链降解.

     

    Abstract: Artificial accelerated aging behaviors of the polysulfide sealants(XM-22B、XM-23) and the fluorosilicone sealant(FVMQ) were studied.Artificial accelerated aging experiments of XM-22B and FVMQ samples were carried out by means of hot-air,and XM-23 samples were carried out by means of xenon arc lamp.Then the appearances of the samples were analyzed,and their tensile strengths were measured.Finally,the change of radicals of the sealants was analyzed by FT-IR.The results show that the gloss of sealants little changed before and after aging.The tensile strength of aeronautical sealants was less obvious after aged for 28 days.The tensile strength of XM-22B increased by 2% after being aged by hot-air aging,FVMQ increased by 5% after being aged by hot-air aging,and the tensile strength of XM-23 decreased by 3% after being aged by xenon lamp aging.Whether it is hot-air aging or xenon lamp aging,Shore A hardness of aeronautical sealants was increased.Shore A hardness of XM-22B,XM-23 and FVMQ increased by 15%,23% and 11% respectively.It is concluded that XM-23 has no clear degradation after being aged for 28 days.

     

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