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Effect of accelerated xenon lamp aging on the mechanical properties and structure of thermoplastic polyurethane for stratospheric airship envelope

  • Organic Materials
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Abstract

This study aimed to investigate the effect of artificial weathering test on the photoaging behavior of TPU films. Changes in mechanical properties, morphology and chemical structures are studied by tensile test, scanning electron microscopy, atomic force microscopy, Fourier-transformed infrared, and X-ray photoelectron spectroscopy. The results show that the photoaging negatively affects the initial modulus and stress at break values of TPU films. The surface of the specimen that is exposed to irradiation becomes rough, and some visible micro-defects such as blisters and voids can be detected. The morphology of the fracture surfaces illustrates that irradiation reduces the plasticity but increases the brittleness of the TPU films. The chemical structure analyses of the accelerated aged films prove that chemical structural changes in TPU films occur. The irradiation may break the long molecular chains on the surface of the specimens and form the low-molecular weight oxygen-containing groups. The number of chain scissions increases with the increase in exposure time.

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Authors and Affiliations

  1. School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin, 150001, China

    Yuyan Liu  (刘宇艳), Yuxi Liu & Shaozhu Liu

  2. School of Material Science and Chemical Engineering, Chuzhou University, Chuzhou, 239000, China

    Yuxi Liu

  3. Science and Technology on Advanced Composites in Special Environments Laboratory, Harbin Institute of Technology, Harbin, 150080, China

    Huifeng Tan  (谭惠丰)

Authors
  1. Yuyan Liu  (刘宇艳)
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  2. Yuxi Liu
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  3. Shaozhu Liu
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  4. Huifeng Tan  (谭惠丰)
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Corresponding author

Correspondence to Huifeng Tan  (谭惠丰).

Additional information

Funded by the Fundamental Research Funds for the Central Universities (No.HIT.KISTP.201408)

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Liu, Y., Liu, Y., Liu, S. et al. Effect of accelerated xenon lamp aging on the mechanical properties and structure of thermoplastic polyurethane for stratospheric airship envelope. J. Wuhan Univ. Technol.-Mat. Sci. Edit. 29, 1270–1276 (2014). https://doi.org/10.1007/s11595-014-1080-7

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  • DOI: https://doi.org/10.1007/s11595-014-1080-7

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