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Materials 2018, 11(6), 921; https://doi.org/10.3390/ma11060921

Improving Thermo-Oxidative Stability of Nitrile Rubber Composites by Functional Graphene Oxide

1
State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation & School of Materials Science and Engineering, Southwest Petroleum University, Chengdu 610500, China
2
Petrochemical Research Institute, PetroChina, Lanzhou 730060, China
3
Institut für Physik, Universität Rostock, Albert-Einstein-Str. 23-24, 18051 Rostock, Germany
*
Authors to whom correspondence should be addressed.
Received: 11 April 2018 / Revised: 15 May 2018 / Accepted: 23 May 2018 / Published: 30 May 2018
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Abstract

Graphene oxide (GO), modified with anti-aging agent p-phenylenediamine (PPD), was added into nitrile rubber (NBR) in order to improve the thermo-oxidative stability of NBR. The modification of GO and the transformation of functional groups were characterized by Fourier transform infrared spectroscopy (FTIR), Raman, and X-ray diffraction (XRD). Mechanical performances of NBR composites before and after the thermo-oxidative aging were recorded. The results of dynamic mechanical analysis (DMA) show an increased storage modulus (G’) and a decreased value of area of tan δ peak after introducing modified GO into NBR. It indicates that filler particles show positive interaction with molecular chains. The thermo-oxidative stability of composites was investigated by thermogravimetric analysis (TG) and differential scanning calorimetry (DSC). Then, the thermo-oxidative aging kinetic parameters were obtained by the Flynn–Wall–Ozawa (FWO) equation. The results of aging tests show that the thermo-oxidative stability of rubber matrix increases obviously after introducing GO–PPD. In addition, mechanical properties (tensile strength and elongation at break) of both before and after aged NBR/GO–PPD composites were superior to that of NBR. This work provides meaningful guidance for achieving multifunction thermo-oxidative aging resistance rubber composites. View Full-Text
Keywords: graphene oxide (GO); p-phenylenediamine (PPD); nitrile rubber (NBR); thermo-oxidative stability graphene oxide (GO); p-phenylenediamine (PPD); nitrile rubber (NBR); thermo-oxidative stability
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited (CC BY 4.0).
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Zhong, R.; Zhang, Z.; Zhao, H.; He, X.; Wang, X.; Zhang, R. Improving Thermo-Oxidative Stability of Nitrile Rubber Composites by Functional Graphene Oxide. Materials 2018, 11, 921.

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