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遠(yuǎn)紫外輻射下Kapton/Al薄膜材料的力學(xué)性能研究

Effects of far ultraviolet irradiation on mechanical properties of Kapton/Al film

  • 摘要: 薄膜材料在探測(cè)器中有著重要的應(yīng)用，在深空輻照環(huán)境下，其力學(xué)性能將發(fā)生較大的變化。文章首先介紹了薄膜材料在航天器中的應(yīng)用，接著對(duì)Kapton/Al薄膜材料空間遠(yuǎn)紫外輻照下的力學(xué)性能進(jìn)行了研究。研究發(fā)現(xiàn)：隨著拉伸速度增加，薄膜的抗拉強(qiáng)度和斷裂伸長(zhǎng)率隨著拉伸速度的增加而降低；隨著遠(yuǎn)紫外曝輻量的增加而呈線性減小；遠(yuǎn)紫外輻照下薄膜材料分子鍵出現(xiàn)斷裂和交聯(lián)，C―CO和C―N鍵斷裂并發(fā)生脫氧和脫氮，C-H基團(tuán)相對(duì)含量增大的主要原因是薄膜力學(xué)性能降低。

     

    Abstract: Films are widely used in spacecrafts, but their mechanical properties would degrade in space irradiation environment. This paper reviews the applications of films in spacecraft and the effects of far ultraviolet irradiation on the mechanical properties of Kapton/Al film. It is shown that the tensile strength and the rupture elongation of Kapton/Al film decrease with the increase of the tensile deformation rate and the far ultraviolet irradiation. The far ultraviolet irradiation will cause the rupture and cross linkage of molecular bonds in the film, deoxidation of C―CO, denitrification of C―N. The increase of C―H percentage attributes mainly to the mechanical property degradation of Kapton/Al film under far ultraviolet irradiation.

     

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