Synthesis and characterization of highly gross-linked, monodisperse core-shell and inverted core-shell colloidal particles. Polystyrene/poly(tert-butyl acrylate) core-shell and inverse core-shell particles

We report on the synthesis of nearly monodisperse phase-separated polymer l atexes with a well-defined core-shell morphology. Styrene/diisopropenylbenz ene and tert-butyl acrylate/ethylene glylcol-diacrylate were used for eithe r the core or shell of the composite microgel particles. A major concern of the paper is the detailed characterization of the core-shell and inverse c ore-shell particles by static and dynamic light scattering, transmission el ectron microscopy, solid-state NMR, and the analytical ultracentrifuge. The effect of the cross-linking agent on the final phase-separated morphology is discussed and compared with theoretical predictions.