Synergistic Effects of Gamma Irradiation, Tensile Stress and Moisture on the Radiolysis of Silicone Foam

Pu-Cheng Wang; Qiang Liu; Bo Liu; Wei Huang; You An; Jian-Yong Liu; Hong-Bing Chen

doi:10.1007/s10118-023-2993-4

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Synergistic Effects of Gamma Irradiation, Tensile Stress and Moisture on the Radiolysis of Silicone Foam

RESEARCH ARTICLE | Updated：2023-11-27

- Synergistic Effects of Gamma Irradiation, Tensile Stress and Moisture on the Radiolysis of Silicone Foam
- Chinese Journal of Polymer Science Vol. 41, Issue 12, Pages: 1969-1978(2023)
- Affiliations：
  
  1.Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621000, China
- Author bio：
  
  hongbing2014@foxmail.com
- Funds：
- DOI：10.1007/s10118-023-2993-4
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Wang, P. C.; Liu, Q.; Liu, B.; Huang, W.; An, Y.; Liu, J. Y.; Chen, H. B. Synergistic effects of gamma irradiation, tensile stress and moisture on the radiolysis of silicone foam. Chinese J. Polym. Sci. 2023, 41, 1969–1978

Pu-Cheng Wang, Qiang Liu, Bo Liu, et al. Synergistic Effects of Gamma Irradiation, Tensile Stress and Moisture on the Radiolysis of Silicone Foam. [J]. Chinese Journal of Polymer Science 41(12):1969-1978(2023)
Wang, P. C.; Liu, Q.; Liu, B.; Huang, W.; An, Y.; Liu, J. Y.; Chen, H. B. Synergistic effects of gamma irradiation, tensile stress and moisture on the radiolysis of silicone foam. Chinese J. Polym. Sci. 2023, 41, 1969–1978 DOI： 10.1007/s10118-023-2993-4.

Pu-Cheng Wang, Qiang Liu, Bo Liu, et al. Synergistic Effects of Gamma Irradiation, Tensile Stress and Moisture on the Radiolysis of Silicone Foam. [J]. Chinese Journal of Polymer Science 41(12):1969-1978(2023) DOI： 10.1007/s10118-023-2993-4.

摘要

The work involves investigation of synergistic effects of gamma irradiation, tensile stress and absorbed moisture on the radiolysis behaviors of silicone foams by experiments and theoretical simulations. The synergistic effects unveiled by reactive molecular dynamics at the atomic scale are due to the moisture-induced neutralization and stabilization of the macromolecular radicals.

Abstract

The present work involves the investigation of the synergistic effects of gamma irradiation, tensile stress and absorbed moisture on the radiolysis behaviors of silicone foams by experiments and theoretical simulations. For both the pristine and dehydrated samples, the permanent tensile set increases with the initial tensile strain. Further analysis uncovers that the dehydrated samples exhibit greater permanent tensile sets, lower further elongation and higher Young’s modulus than the counterparts of the pristine samples with the same initial tensile strain and gamma dose, verifying the vital synergistic effects on crosslinking network and aggregation structures caused by moisture and gamma radiation. The synergistic effects unveiled by reactive molecular dynamics at the atomic scale are due to the moisture-induced neutralization and stabilization of the macromolecular radicals. The steric hindrance of moisture located at the interface of silica and polymer chains also conduces to the observed synergistic effects due to the inhibited crosslinking reactions.

关键词

Keywords

Silicone foamSynergistic effectGamma irradiationTensile stressMoisture

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