沈自才,马子良,代巍,牟永强,白羽,丁义刚.空间远紫外辐照聚酰亚胺薄膜力学性能演化机理[J].表面技术,2018,47(5):22-26.
SHEN Zi-cai,MA Zi-liang,DAI Wei,MU Yong-qiang,BAI Yu,DING Yi-gang.Evolution Mechanism for Mechanical Property of Polyimide Film by Far Ultraviolet Irradiation[J].Surface Technology,2018,47(5):22-26
空间远紫外辐照聚酰亚胺薄膜力学性能演化机理
Evolution Mechanism for Mechanical Property of Polyimide Film by Far Ultraviolet Irradiation
投稿时间:2017-11-27  修订日期:2018-05-20
DOI:10.16490/j.cnki.issn.1001-3660.2018.05.004
中文关键词:  聚酰亚胺  薄膜  远紫外  抗拉强度  断裂伸长率
英文关键词:polyimide  film  far ultraviolet  tensile strength  rupture elongation
基金项目:国家自然科学基金项目(41174166);国防科工局技术基础科研项目(JSHS2015203B002, JSHS2016203A001)
作者单位
沈自才 北京卫星环境工程研究所,北京 100094 
马子良 北京卫星环境工程研究所,北京 100094 
代巍 北京卫星环境工程研究所,北京 100094 
牟永强 北京卫星环境工程研究所,北京 100094 
白羽 北京卫星环境工程研究所,北京 100094 
丁义刚 北京卫星环境工程研究所,北京 100094 
AuthorInstitution
SHEN Zi-cai Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China 
MA Zi-liang Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China 
DAI Wei Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China 
MU Yong-qiang Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China 
BAI Yu Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China 
DING Yi-gang Beijing Institute of Spacecraft Environment Engineering, Beijing 100094, China 
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中文摘要:
      目的 掌握空间远紫外作用下聚酰亚胺薄膜力学性能的演化机理。方法 用氘灯作为辐照源进行远紫外辐照,用电子拉力试验机进行力学性能拉伸试验,利用热重分析、XPS分析等对远紫外辐照下聚酰亚胺薄膜的成分、价键结构、热重等进行分析测试。结果 在远紫外辐照下,聚酰亚胺薄膜的抗拉强度和断裂伸长率随着曝辐量的增加先减小,而后呈指数增大,最后趋于稳定。由热重分析可知,远紫外辐照导致聚酰亚胺薄膜出现明显质量损失的温度由575 ℃下降为550 ℃。由XPS分析可知,远紫外辐照诱发聚酰亚胺薄膜化学价键的断裂和交联。在辐照初期,以C=O、C—O、C—N和C—C等价键的断裂为主,进而引起力学性能的降低。随着曝辐量的增加,C—O—N价键含量升高、C—N键和C—O—C价健含量减少、游离N生成,是导致薄膜力学性能增加的主要原因,此时以价健交联为主。结论 分子价键的断裂和交联是导致远紫外辐照作用下聚酰亚胺薄膜力学性能发生变化的主要原因,随着远紫外曝辐量的增加,分子价键先是以断裂为主,而后以交联为主。
英文摘要:
      The work aims to understand the evolution mechanism for mechanical property of polyimide film by far ultraviolet irradiation. Deuterium lamp was used as simulation source of far ultraviolet irradiation, electronic tension tester was adopted to detect mechanical tensile, thermo gravimetric and XPS were used to analyze and test composition, valence bond structure and thermogravimetry. Under far ultraviolet irradiation, tensile strength and rupture elongation of polyimide film decreased firstly, then exponentially increased and finally tended to be stable as the radiant exposure increased. From thermogravimetric analysis, the temperature of far ultraviolet irradiation causing obvious mass loss in polyimide film dropped to 550 ℃ from 575 ℃. From XPS analysis, rupture and crosslink of chemical bond in polyimide film could be caused by far ultraviolet irradiation. In early stage of far ultraviolet radiation, the rupture of C—N, C=O, C—O, C—C bond was caused to decrease mechanical properties of polyimide film. As far ultraviolet exposure increased, the increase of C—O—N bond, the decrease of C—N bond and C—O—C bond and generation of free N mainly led to the increase of mechanical properties of polyimide film as bond crosslinking. Rupture and crosslinking of molecular bond are primary cause for the change in mechanical properties of polyimide film under far ultraviolet irradiation. As the far ultraviolet exposure increases, the molecular bond firstly ruptures and then crosslinks.
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