Analysis and modeling of modified styrene–acrylonitrile/carboxylated acrylonitrile butadiene rubber nanocomposites filled with graphene and graphene oxide: Interfacial interaction and nonlinear elastoplastic behavior

• Published in: Polymer engineering and science 2021-11, Vol.61 (11), p.2894-2909
• Main Authors: Azizli, Mohammad Javad, Dehaghi, Fatemeh Morshedi, Nasrollahi, Bahareh, Barghamadi, Mohammad, Rezaeeparto, Katayoon, Parham, Somayeh, Mokhtary, Masoud, Ramakrishna, Seeram, Ghomi, Erfan Rezvani
• Format: Article
• Language: English
• Subjects: ABS resins; Acrylonitrile; Analysis; Bergstrom–Boyce model; Butadiene; carboxylated acrylonitrile butadiene rubber; Compatibility; compatibilizer; Dispersion; Elastoplasticity; Elongation; Field emission microscopy; Graphene; graphene oxide; hybrid nanocomposite; Mechanical properties; Modelling; Nanocomposites; Nanoparticles; Oxides; Polymeric composites; Rubber; Scanning microscopy; Structure; Styrene; Styrene acrylonitrile resins; Styrenes; styrene–acrylonitrile; Tensile tests; Transmission electron microscopes; Transmission electron microscopy
• ISSN: 0032-3888; 1548-2634
• DOI: 10.1002/pen.25807

Nonlinear elastoplastic behavior of the nanocomposites based on the styrene–acrylonitrile/carboxylated acrylonitrile butadiene rubber (SAN/XNBR) blend was investigated using experimental and theoretical analysis. Graphene, graphene oxide nanoparticles, and glycidyl methacrylate‐grafted‐XNBR (XNBR‐g‐GMA) as a compatibilizer were incorporated in the SAN/XNBR blends. In this regard, the focus of this study is on modeling of the stress–strain behavior of these nanocomposites, considering the effect of the interfacial interactions made by compatibilizer. For this purpose, field emission scanning electron microscopy (FESEM) and transmission electron microscope (TEM) techniques were used to investigate the relationship between microstructure and mechanical properties of nanocomposites. In addition, FESEM and TEM images showed that the presence of a compatibilizer could influence the dispersion and localization of the nanoparticles. According to the tensile test results, the presence of the compatibilizer increased the mechanical properties of the nanocomposites, specifically elongation at break. Considering the nanocomposite containing compatibilizer and graphene oxide, the elongation at break increased about 570% compared with the nanocomposite without compatibilizer. Better dispersion of graphene oxide and the creation of chemical interaction among components in the presence of the XNBR‐g‐GMA compatibilizer could be the reasons for these improvements, as confirmed by TEM. The usage of the Bergstrom–Boyce model for analyzing the nonlinear elastoplastic behavior of the nanocomposites illustrated proper conformity with the experimental data in the elastic region. However, there are some deviations in the viscoplastic region, particularly close to the breaking elongation region. Most probable chemical interaction of XNBR/XNBR‐g‐GMA, SAN, and graphene oxide.