Dispersion Polymerization of Polystyrene Particles Using Alcohol as Reaction Medium

Abstract

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 compositions such as the amount of stabilizer, comonomer, and water in the reactant mixture. The size and monodispersity of the polymeric particles could be also controlled by changing the reaction medium with different alcohols other than ethanol or adjusting the polymerization temperature. The synthesized particles could be self-organized inside water-in-oil emulsion droplets by evaporation-driven self-assembly to produce colloidal clusters of the polymeric nanospheres.

Latex particles by emulsion and dispersion polymerizations: sensitization with specific antigens of leptospirosis and application to immunoagglutination

“…Concentrations of PVP, AIBN and Sty were varied in experiments S13, S14, S15, S16 and S17 and it was observed that: (1) the reduction in the amount of the initial monomer (see columns S14 vs. S15 in Table 1) gave place to lower values of reaction rates, final conversion, and polydispersity index, without practically affecting the final D DLS , (2) the increase of PVP concentration (see columns S13 and S16) reduced the particle diameter and this effect was higher when the AIBN concentration was decreased (column S17). This last observation is in accordance with results by Cho et al (2016), where the effect of reactants (Sty, AIBN and PVP) and conditions (temperature, dispersion medium) were modified to control the particle diameter in dispersion polymerization. When the radical concentration of AIBN in monomer droplets increased, it resulted in the enlargement of the particle diameter as a function of polymerization temperature.…”

Synthesis of Porous Silica Particles for the Adsorption of Organic Dye in Aqueous Medium

“…After synthesis, the polymeric particles were redispersed in fresh ethanol by repeated centrifugation and sonication for further uses. The detailed synthesis method can be found elsewhere [15].…”

Microwave-assisted synthesis of glutathione-coated hollow zinc oxide for the removal of heavy metal ions from aqueous systems

“…Polystyrene was synthesized from styrene by dispersion polymerization method, as already reported in the literature. 35 In this typical synthesis, styrene and PVP in a ratio of 2 : 1 (w/w) were mixed in ethanol under continuous stirring at 343 K. A few drops of sodium persulfate solution were added to polymerize the styrene and the solution was continuously stirred for the next 4 h. The mixture was then centrifuged, washed with ethanol and deionised water many times in order to remove PVP and other impurities, and then dried at 300 K in an oven.…”