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doi:10.11889/j.1000-3436.2015.rrj.33.060301

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- Journal of Radiation Research and Radiation Processing Vol. 33, Issue 6, Pages: 60301-060301(2015)
- 作者机构：
  
  1. 1（中广核三角洲（江苏）塑化有限公司）,苏州,215400
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- DOI：10.11889/j.1000-3436.2015.rrj.33.060301
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[J]. Journal of Radiation Research and Radiation Processing 33(6):60301-060301(2015)
DOI：

[J]. Journal of Radiation Research and Radiation Processing 33(6):60301-060301(2015) DOI： 10.11889/j.1000-3436.2015.rrj.33.060301.

摘要

采用剂量率为20 kGy/h的电子束在空气氛围中对乙烯-四氟乙烯共聚物(Ethylene tetra-fluoro-ethylene- copolymer, ETFE)片材进行辐照，剂量范围0–1600 kGy，研究了ETFE片材在低剂量率电子束辐照下的化学稳定性。通过机械性能、红外光谱、拉曼光谱和扫描量热仪(DSC)等对辐照前后的样品进行了测试和表征。机械性能测试结果表明，随着吸收剂量的增加，断裂伸长率和断裂强度在0–200 kGy内缓慢下降，超过400 kGy则急剧下降；红外光谱分析表明，随着吸收剂量的增加，羰基指数增加，样品表面氧化程度严重；拉曼光谱分析结果显示低剂量率电子束的辐照破坏了ETFE分子链结构的对称性；DSC测试结果表明，随着吸收剂量的增加，ETFE的结晶度和熔点逐渐下降，结晶度从43.2%下降到12.6%，熔点从261.3 ℃下降到233.3 ℃。

Abstract

The ethylene tetra-fluoro-ethylene-copolymer (ETFE) sheets were irradiated by electron beam at low dose rate of 20 kGy/h in the air. The absorbed dose range was 0–1600 kGy. The samples irradiated with different absorbed doses were tested and characterized by mechanical properties, infrared spectroscopy, Raman spectroscopy and DSC (differential scanning calorimetry). The results showed that elongation and tensile strength decreased slowly within the dose range of 0–200 kGy, however, it dropped sharply when the dose was more than 400 kGy. The results of infrared spectra showed that the carbonyl index increased with absorbed dose, which indicated that the surface of sample was severely oxidized during irradiation. The results of Raman spectroscopy analysis showed that low dose rate irradiation of electron beam disrupted ETFE molecular chain. DSC test results showed that, with the increasing of the absorbed dose of ETFE, crystallinity and melting point decreased gradually; the crystallinity decreased from 43.2% to 12.6%; and the melting point decreased from 261.3 ℃ to 233.3 ℃.Cited

关键词

乙烯-四氟乙烯共聚物低剂量率电子束辐照化学稳定性

Keywords

Ethylene-tetra-fluoro-ethyleneLow dose rateElectron beamIrradiationChemical stability

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Hunan Institute of Nuclear Agricultural Science and Space Mutation Breeding, Hunan Academy of Agricultural Sciences/Hunan Province Engineering Technology Research Center of Agricultural Biological Irradiation

Longping Branch, Graduate School of Hunan University

Institute of Nuclear Physics and Chemistry, China Academic of Engineering Physics

School of Material and Architecture Engineering, Guizhou Normal University

Institute of Applied Technical Physics of Zhejiang Province

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DOI：10.11889/j.1000-3436.2015.rrj.33.060301

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