The Structure of Polymeric Colloid Particles and the Effect Associated with It

Investigation of the effects of curing and casting methods on the physicochemical properties of polymeric coating systems

“…In the emulsion copolymerization (28) or seeded-emulsion polymerization (33,34) of two monomers of different polarity, more of the hydrophilic monomers (containing acrylic acid, methacrylic acid, and so on) tend to accumulate on the surfaces of the particles and more of the hydrophobic monomers will prefer to reside in the body of the particles to decrease the Gibbs free energy. This will lead to a "core-shell" morphology of the particles with a hydrophilic shell and a hydrophobic core (35). When copolymers of butylacrylate (BA) and methacrylic acid (MAA) or acrylic acid (AA) were prepared by batch emulsion polymerization, the surface of the latex particles was found to be rich in AA or MAA.…”

“…The effect of curing time and temperature on the glass transition temperatures of SR30D films is illustrated in Figure 3 such as acid groups [22,23], ionic concentration [24,25], category of counter ion [26][27][28][29], plasticizers [30][31][32] and thermal treatment [25,[33][34][35][36]. Dynamic mechanical analysis After curing at 60°C for 4 hours, there were two endothermic peaks.…”

“…Schematic representation of the distribution of hydrophilic functional groups in latex particles and films (35). Most of the polymers used in film coating are amorphous, and the amorphous polymers are not in thermodynamic equilibrium when stored at temperatures lower than Tg.…”