Dynamics of water-based acrylic polymers/silicon dioxide nanocomposate coatings

Researchers recently studied the dynamics and viscous elasticity of water-based acrylic polymer/silicon dioxide nanocomposed coatings.
in-place nanostructure latex is prepared using semi-intermittent mode emulsion polymerization and contains up to 3wt% diameter of 7nm of nano-silicon dioxide (Romo-Uribe, etc., Europ). POLYM
China
. J. 2016, 76, 170-186. The coating's high-resolution transmission electron microscope (HRTEM) shows good dispersion of nanoparticles with low silica content. Increased silica content by up to 3wt% reduces particle-to-particle distance and proves large molecular limits. The glass transition temperature Tg increased with the content of silica, indicating a change in synergistic dynamics. Large molecular dynamics are studied by using time-temperature overlays (TTS) to construct the main curve under Tref s Tg s 50K.
rubber-like nanocomposives are more elastic than pure polymers
the melts of the nanostructures are tangled and exhibit only rubber-like and transition states. Remarkably, the viscous elastic response exhibits tangled dilution behavior, i.e. the rubber-like mould Ge is reduced by twice as much as the pure polymer. With the increase of the limit, with the increase of nano-silicon dioxide content, Ge gradually increased. Despite tangled dilution, the rubber-like areas of nanocomposomes are more elastic than pure polymers. With the same order of magnitude of molecular weight of polymer substates and nanocomposates, the decrease in tangle density and then the increase is the nano-limiting effect. The dilation of the tangled network produces a small elastic stretch and shear mod at room temperature.
The study was published last week: Progress in Organics Coatings, volume 129, April 2019, pp. 125-132.