Single Stage Polymerization of Micron-Size Polystyrene Particles.

Synthesis of Silica/Polystyrene Nanocomposite Particles by Miniemulsion Polymerization

Miniemulsion polymerization is one of heterogeneous polymerization method that can be effectively used to synthesis of various novel organic-inorganic nanocomposite particles. This method can provide opportunity of good incorporation between the polymer and inorganic phases in the formed submicrometer-sized particles. In this article, we report preparation polystyrene/silica nanocomposite p...

synthesis of silica/polystyrene nanocomposite particles by miniemulsion polymerization

Dispersion Polymerization of Polystyrene Particles Using Alcohol as Reaction Medium

In this study, monodisperse polystyrene nanospheres were prepared by dispersion polymerization using alcohol as reaction medium to prepare colloidal clusters of the latex beads. Polyvinylpyrrolidone (PVP) and 2-(methacryloyloxy)ethyltrimethylammonium chloride (MTC) were used as dispersion stabilizer and comonomer, respectively. The particle size could be controlled by adjusting the reactant com...

Motion of micron–size particles in turbulent helium II

Abstract The surprising result of a recent experiment in turbulent helium II is that micron–size tracer particles move with about half the speed of the imposed normal fluid. We develop a theory of the interaction of small spheres with quantized vortices and predict that the particles slip velocity (resulting from the balance of buoyancy and Stokes drag forces) must be corrected by an amount whi...

Size and density of polystyrene particles measure by ultracentrifugation.

A material currently in use (1) for calibration of electron magnification is a polystyrene latex, characterized by a remarkably high degree of particle uniformity with respect to size and shape. The particles, spherical in shape and stable in water suspension, are in a range suitable not only for electron micrography but for independent determinations of size by sedimentation velocity, viscosit...