The shearing proceeds usually via ultrasonication of the mixture or with a high-pressure homogenizer, which are high-shearing processes. In an ideal miniemulsion system, coalescence and Ostwald ripening are suppressed thanks to the presence of the surfactant and co-surfactant, respectively.
Stable droplets are then obtained, which have typically a size between 50 and 500 nm. The miniemulsion process is therefore particularly adapted for the generation of nanomaterials. There is a fundamental difference between traditional emulsion polymerisation and a miniemulsion polymerisation. Particle formation in the former is a mixture of micellar and homogenous nucleation, particles formed via miniemulsion however are mainly formed by droplet nucleation.
Conventional and RAFT miniemulsion copolymerizations of butyl methacrylate with fluoromethacrylate and monomer reactivity ratios.(reversible addition fragmentation chain transfer)(Report)
Sep 01, 2009; INTRODUCTION Fluorinated polymers have always been attracting significant attentions because of their distinct properties,...
Synthesis of triblock copolymer having alternating structures and kinetics study on RAFT-mediated bulk, miniemulsion and seed miniemulsion polymerizations.(Report)
Jun 01, 2011; INTRODUCTION It is well known that the properties of polymers (block copolymers, graft copolymers, star copolymers, and so on)...