Citation: Yong Guan, Jian Hu, Yong-Kang Huang, Yang You, Huan-Yao Zhang, An-Na Zheng, Xiang Xu, Da-Fu Wei. Synthesis of Cerium-containing Polymethylphenyl Silicone and Its Antioxidant Effect on Fluorosilicone Rubber[J]. Chinese Journal of Polymer Science, ;2019, 37(8): 783-789. doi: 10.1007/s10118-019-2266-4 shu

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

Yong Guan ^1,2 ,
Jian Hu ¹ ,
Yong-Kang Huang ¹ ,
Yang You ¹ ,
Huan-Yao Zhang ¹ ,
An-Na Zheng ¹ ,
Xiang Xu ^1,2,, ,
Da-Fu Wei ¹

a.
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
b.
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

Corresponding author: Xiang Xu, xiangxu@ecust.edu.cn
Received Date: 4 January 2019
Revised Date: 14 March 2019
Available Online: 10 May 2019

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.
- Polymethylphenyl silicone,
- Cerium,
- Fluorosilicone rubber,
- Thermal stability
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