Optical Testing of Degradation of Films of Polytetrafluoroethylene and Its Modification under Electron Irradiation

IF 0.9 4区 材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING Russian Journal of Nondestructive Testing Pub Date : 2024-02-20 DOI:10.1134/S1061830923700584
E. N. Vazirova, R. M. Abashev, I. I. Milman, A. I. Surdo
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Abstract

A method for monitoring the degradation of the optical density in films of polytetrafluoroethylene and its modification, a copolymer of tetrafluoroethylene and ethylene, irradiated by electrons with energies of 100 keV and 10 MeV is described. The method is based on measuring the optical density of irradiated films in the photon energy range of 1–6 eV and is confirmed by established “dose–optical absorption” relationships. In particular, using the described method, a completely different nature of the radiation degradation of the optical properties of the two types of films under study was discovered. With an increase in the irradiation dose, “clearing effect” in the region of 2–5 eV and the occurrence of an absorption band at 5.6 eV are observed in polytetrafluoroethylene films. With a similar dose increase, three absorption bands at 4.0, 4.6, and 5.5 eV appear and grow in films of copolymer of tetrafluoroethylene and ethylene. The evidence of the critical role of the optical density of films in the functioning of space technology devices is given.

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电子辐照下聚四氟乙烯薄膜降解及其改性的光学测试
摘要 描述了一种监测聚四氟乙烯及其改性物(四氟乙烯和乙烯的共聚物)薄膜光密度衰减的方法,该改性物受到能量为 100 keV 和 10 MeV 的电子辐照。该方法基于在 1-6 eV 的光子能量范围内测量辐照薄膜的光密度,并通过已建立的 "剂量-光吸收 "关系加以确认。特别是,通过使用所述方法,我们发现辐射对所研究的两种薄膜光学特性的降解具有完全不同的性质。随着辐照剂量的增加,在聚四氟乙烯薄膜中观察到 2-5 eV 区域的 "清除效应 "和 5.6 eV 的吸收带。在增加类似剂量的情况下,四氟乙烯和乙烯共聚物薄膜中会出现 4.0、4.6 和 5.5 eV 的三个吸收带,并不断扩大。这证明了薄膜的光密度在空间技术设备的运行中起着至关重要的作用。
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来源期刊
Russian Journal of Nondestructive Testing
Russian Journal of Nondestructive Testing 工程技术-材料科学:表征与测试
CiteScore
1.60
自引率
44.40%
发文量
59
审稿时长
6-12 weeks
期刊介绍: Russian Journal of Nondestructive Testing, a translation of Defectoskopiya, is a publication of the Russian Academy of Sciences. This publication offers current Russian research on the theory and technology of nondestructive testing of materials and components. It describes laboratory and industrial investigations of devices and instrumentation and provides reviews of new equipment developed for series manufacture. Articles cover all physical methods of nondestructive testing, including magnetic and electrical; ultrasonic; X-ray and Y-ray; capillary; liquid (color luminescence), and radio (for materials of low conductivity).
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