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Synthesis of Cerium-containing Polymethylphenyl Silicone and Its Antioxidant Effect on Fluorosilicone Rubber

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Abstract

As an essential elastomer used in edge technologies, fluorosilicone rubber (FSR) suffers serious oxidative ageing problem when serving at high temperature. Cerium oxide is generally used as an antioxidant additive but remains unsatisfactory. In order to obtain better antioxidant effect on improving the thermal stability of FSR, a kind of cerium-containing polymethylphenyl silicone (PSI-Ce) was synthesized and the structure was verified by Fourier-transform infrared spectroscopy (FTIR) and proton nuclear magnetic resonance (1H-NMR). Due to the homogeneous dispersion on molecular scale, PSI-Ce imposed much better antioxidant effect than the commercial CeO2 did, no matter from isothermal degradation at 320 °C or thermal-oxidative ageing test at 230 °C. In particular, after ageing for 72 h, FSR/PSI-Ce (2 phr) maintained 82% of tensile strength and 63% of elongation at break, in comparison to the corresponding values of 48% and 42% for FSR/CeO2 (2 phr). Moreover, 2 phr PSI-Ce was equivalent to 0.046 phr CeO2 according to cerium element conservation.

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Acknowledgments

This work was financially supported by the National Natural Science Foundation of China (Nos. 51573043 and 21805086) and the Fundamental Research Funds for the Central Universities (Nos. 222201817001 and 222201814004). This research was supported by the Shanghai Leading Academic Discipline Project (No. B502) and the Shanghai Key Laboratory Project (No. ZD20170203). Support from FSIR Advanced Material Co., Ltd. was also gratefully acknowledged.

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Authors and Affiliations

  1. Key Laboratory for Ultrafine Materials of Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

    Yong Guan, Jian Hu, Yong-Kang Huang, Yang You, Huan-Yao Zhang, An-Na Zheng, Xiang Xu & Da-Fu Wei

  2. Key Laboratory for Specially Functional Polymeric Materials and Related Technology of the Ministry of Education, School of Materials Science and Engineering, East China University of Science and Technology, Shanghai, 200237, China

    Yong Guan & Xiang Xu

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  1. Yong Guan
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Correspondence to Xiang Xu.

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Guan, Y., Hu, J., Huang, YK. et al. Synthesis of Cerium-containing Polymethylphenyl Silicone and Its Antioxidant Effect on Fluorosilicone Rubber. Chin J Polym Sci 37, 783–789 (2019). https://doi.org/10.1007/s10118-019-2266-4

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