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Materials, Vol. 11, Pages 921: Improving Thermo-Oxidative Stability of Nitrile Rubber Composites by Functional Graphene Oxide

Materials, Vol. 11, Pages 921: Improving Thermo-Oxidative Stability of Nitrile Rubber Composites by Functional Graphene Oxide

Materials doi: 10.3390/ma11060921

Authors: Rui Zhong Zhao Zhang Hongguo Zhao Xianru He Xin Wang Rui Zhang

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.

Authors:   Zhong, Rui ; Zhang, Zhao ; Zhao, Hongguo ; He, Xianru ; Wang, Xin ; Zhang, Rui
Journal:   Materials
Volume:   11
edition:   6
Year:   2018
Pages:   921
DOI:   10.3390/ma11060921
Publication date:   30-May-2018
Facts, background information, dossiers
  • graphene oxide
  • thermogravimetric analysis
  • tensile strength
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