Abstract:

Janus nanosheets （JNSs） were prepared through one?pot synthesis， and the surface morphology and chemical compositions were characterized using scanning electron microscope and electric cooling X-ray energy spectrometer. The effect of JNSs on the rheological， dynamic mechanical properties and mechanical properties of polystyrene（PS）/TiO₂ blends as well as their morphology were investigated using dynamic hybrid rheometer， dynamic mechanical thermal analyzer and universal material testing machine. The results indicated that the prepared JNSs showed different rough levels on their two sides. The rough concave and smooth convex surfaces were found to contain amino groups and double bonds， respectively. The JNSs can be used as a compatibilizer for the PS/TiO₂ blending system to enhance interfacial interaction， thus improving the compatibility between the inorganic particles and organic polymers. Compared to pure PS， the glass transition temperature of the PS/TiO₂ composites with 0.5 phr JNSs was increased from 100 to 107 °C. Owing to the enhancement of interfacial interaction， the JNSs can dissipate energy in the direction of the force under the action of external force， resulting in an increase in tensile strength by 13.43 %. The elongation at break also increased from 12 % to 18 %.

Key words: Janus nanosheet, polystyrene, titanium dioxide, compatibilization