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Enhanced properties of poly(styrene– b –ethylene– co –butylene– b –styrene) nanocomposites with in situ construction of interconnected graphene network
Author(s) -
Yue Jia,
Pan Jinkai,
Deng Yuhao,
Li Jie,
Bao Jianjun
Publication year - 2019
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.47118
Subject(s) - materials science , nanocomposite , graphene , composite material , compression molding , elastomer , polymer , scanning electron microscope , oxide , microstructure , composite number , nanotechnology , mold , metallurgy
In this work, such elastomeric nanocomposites were fabricated with graphene (GE) sheets selectively distributing between polymer matrices and forming three‐dimensional networks. The solvent evaporation process was first introduced to produce poly(styrene–ethylene– co –butadiene– b –styrene) (SEBS) microspheres and then reduced GE oxide attached to the surface of SEBS microspheres via electrostatic interaction and sonication‐assisted reduction. The microstructure of nanocomposites, prepared by compression molding using SEBS/GE microspheres, was investigated using scanning electron microscopy and transmission electron microscopy. The results showed that interconnected GE networks formed in heat‐pressing composite and was destroyed after twin‐roll mixing. The SEBS/GE nanocomposites showed enhanced electrical, thermal, and mechanical properties. The electrical resistivity of nanocomposites obtained via heat‐pressing reached to 1.1 × 10 3 Ω m at a 2.5 wt % (1.07 vol %) content of GE. The thermal and mechanical properties were also characterized. It was found that the initial degradation temperature increased by nearly 40 °C and the mechanical properties continued to rise with GE content below 0.5 wt %. © 2018 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019 , 136 , 47118.