Abstract
<p>Emulsion polymerization of styrene was investigated using as an emulsifier the salts of stearic and lauric acids with cations of different metals (K<sup>+</sup>, Li<sup>+</sup>, Ba<sup>2+</sup>, Ca<sup>2+</sup>, Zn<sup>2+</sup>).</p><p>The emulsifier was injected in two ways: using ready salts entered into the aqueous phase (1) or salts formed at the phase boundary of monomer/water at the moment of polymerization (2).</p><p>The second method of injection of the emulsifier proved to be more effective. In this case, there was a significant reduction in the interfacial tension which promotes intense microemulsification of monomer.</p><p>The kinetics of the polymerization were studied by the method of dilatometry. Interfacial tension at the phase boundary monomer/water was measured by stalagmometric method. The sizes of the particles of polymer suspensions were determined by electrophoretic light scattering.</p><p>It is shown that the polystyrene suspension with narrow particle size distribution and with diameter of 0.2 microns can be obtained using as an emulsifier 0.5% of lithium stearate in the conditions of its synthesis at the phase boundary, with a volume ratio of the monomer/aqueous phase of 1:10, the concentration of the initiator - 0.1%.</p><p>Monodispersed granules of polystyrene suspensions with diameter of 0.2 microns are highly promising as carriers of protein cell to create diagnostic kits for various diseases.</p>
Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
