High-temperature Thermo-oxidative Aging of Vulcanized Natural Rubber Nanocomposites: Evolution of Microstructure and Mechanical Properties

Zhou-Xian Li; Yi-Ran Kong; Xiang-Fei Chen; Ya-Jiang Huang; Ya-Dong Lv; Guang-Xian Li

doi:10.1007/s10118-023-2948-9

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High-temperature Thermo-oxidative Aging of Vulcanized Natural Rubber Nanocomposites: Evolution of Microstructure and Mechanical Properties

RESEARCH ARTICLE | Updated：2023-07-18

- High-temperature Thermo-oxidative Aging of Vulcanized Natural Rubber Nanocomposites: Evolution of Microstructure and Mechanical Properties
- High-temperature Thermo-oxidative Aging of Vulcanized Natural Rubber Nanocomposites: Evolution of Microstructure and Mechanical Properties
- 高分子科学（英文版） 2023年41卷第8期页码：1287-1297
- Affiliations：
  
  College of polymer science and engineering, State key laboratory of polymer materials engineering of China, Sichuan University, Chengdu 610065, China
- Author bio：
  
  hyj@scu.edu.cn (Y.J.H.)
  guangxianli@scu.edu.cn (G.X.L.)
- Funds：
  
  This work was financially supported by the National Natural Science Foundation of China (Nos. 51790504 and U19A2096), the Programme of Introducing Talents of Discipline to Universities (No. B13040), and State Key Laboratory of Polymer Materials Engineering (No. sklpme2019-2-07). We would like to thank Mrs. Suiling Liu and Dr. Yong Luo from the Analytical & Testing Center of Sichuan University for their help in characterization.
- DOI：10.1007/s10118-023-2948-9
  中图分类号：
- 收稿：2022-11-10，
  
  修回：2022-12-20，
  
  录用：2023-1-5，
  
  网络首发：2023-03-10，
  
  纸质出版：2023-08-01
- Accepted：
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Li, Z. X.; Kong, Y. R.; Chen, X. F.; Huang, Y. J.; Lv, Y. D.; Li, G. X. High-temperature thermo-oxidative aging of vulcanized natural rubber nanocomposites: evolution of microstructure and mechanical properties. Chinese J. Polym. Sci. 2023, 41, 1287–1297

Zhou-Xian Li, Yi-Ran Kong, Xiang-Fei Chen, et al. High-temperature Thermo-oxidative Aging of Vulcanized Natural Rubber Nanocomposites: Evolution of Microstructure and Mechanical Properties[J]. Chinese Journal of Polymer Science, 2023, 41(8): 1287-1297.
Li, Z. X.; Kong, Y. R.; Chen, X. F.; Huang, Y. J.; Lv, Y. D.; Li, G. X. High-temperature thermo-oxidative aging of vulcanized natural rubber nanocomposites: evolution of microstructure and mechanical properties. Chinese J. Polym. Sci. 2023, 41, 1287–1297 DOI： 10.1007/s10118-023-2948-9.

Zhou-Xian Li, Yi-Ran Kong, Xiang-Fei Chen, et al. High-temperature Thermo-oxidative Aging of Vulcanized Natural Rubber Nanocomposites: Evolution of Microstructure and Mechanical Properties[J]. Chinese Journal of Polymer Science, 2023, 41(8): 1287-1297. DOI： 10.1007/s10118-023-2948-9.

摘要

Abstract

The aging of natural rubber (NR) at high temperatures will seriously affect its service lifetime in many key applications. In the present work

the changes in microstructure and mechanical properties of semi-efficient vulcanized NR/carbon black (CB) vulcanizates during thermo-oxidative aging at high temperatures (150−200 °C) and a moderate temperature (95 °C) were compared. At high temperatures

a two-stage aging behavior

which was characteristic of a first rapid decline and then a continuous rise in the crosslinking density (

)

was identified and was found to be closely related to the depletion behavior of antioxidants. The surface cracking behavior observed in the second stage of high-temperature aging was discussed in terms of the grafting reaction of macromolecular radicals on CB particles and thermal expansion. In contrast

the aging of NR at moderate temperatures was much mild

which featured a continuous increase in

and an oxidation mechanism dominated by peroxy radicals attacking double bonds. In general

the mechanical properties of NR vulcanizates during high-temperature aging depended on the competition effects of structural evolution in the crosslinked network and oxidation-induced chain scission.

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references

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