| Abstract: | This paper presents the synthesis of film-forming particles with controlled diameters. The copolymerization of styrene and
butylacrylate is realized by emulsion synthesis in the presence of potassium sulfopropylmethacrylate (SPM), an ionogenic monomer
and sodium bicarbonate. The initiator, ammonium persulfate, and the SPM ensure the stabilization of particles. After the particles
are washed, their diameters are measured by Dynamic Light Scattering (DLS) with a Zetasizer 3 (Malvern). The particle diameters
are controlled by SPM concentration and the ionic strength of the medium. An increase of ionic strength, at constant SPM],
increases diameters, though an increase of SPM], at constant ionic strength, decreases diameters. The experimental results
are interpreted by two different modelizations, either by log–log equations like in the literature, or by semi-log and exponential
equations. The latter ones give better modelization.
Received: 18 July 1997 Accepted: 3 March 1998 |
