Volume 134, Issue 22
Article

Extraction resistance and mechanism of a macromolecular hindered phenol antioxidant in natural rubber

Wenjian Wu

Wenjian Wu

Department of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808 China

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Hongqiang Li

Corresponding Author

Hongqiang Li

College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640 China

Correspondence to: H. Li (E-mail: [email protected]) and X. Zeng (E-mail: [email protected])Search for more papers by this author
Shuyan Yang

Shuyan Yang

Department of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808 China

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Xuejun Lai

Xuejun Lai

College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640 China

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Hongbo Fan

Hongbo Fan

Department of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808 China

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Haining Cai

Haining Cai

Department of Materials Science and Engineering, Dongguan University of Technology, Dongguan, 523808 China

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Xingrong Zeng

Corresponding Author

Xingrong Zeng

College of Materials Science and Engineering, South China University of Technology, Guangzhou, 510640 China

Correspondence to: H. Li (E-mail: [email protected]) and X. Zeng (E-mail: [email protected])Search for more papers by this author
First published: 10 February 2017
Citations: 14

ABSTRACT

Due to low thermal stability, poor migration, and extraction resistances, the antioxidant with low molecular weight is easy to physically lose during processing and long-term service, and its applications are severely restricted. To increase the molecular weight of antioxidant is one of the promising methods to overcome such drawbacks. In this study, the extraction resistance of a macromolecular antioxidant, namely polyhydroxylated polybutadiene containing thioether binding 2,2′-thiobis(4-methyl-6-tert-butylphenol) (PHPBT-b-TPH), was investigated by extraction resistance test and equilibrium swelling experiment. The results exhibited that the PHPBT-b-TPH offered much better extraction resistance in natural rubber (NR) than the low molecular weight antioxidant TPH. In addition, the extraction resistance of hydroxyl-terminated polybutadiene (HTPB), polyethylene glycol (PEG), and polypropylene glycol (PPG) in NR were also compared to study the extraction mechanism of the PHPBT-b-TPH. It was found that the higher molecular weight of PHPBT-b-TPH and the co-vulcanization between PHPBT-b-TPH and NR were the main reasons for the excellent extraction resistance. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 44905.

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