Method for continuously and dynamically mixing at least two fluids, and micromixer

A polymerization method, comprising:

• (i) driving in rotation the rotor (1) of a micromixer comprising:
• a rotor (1) comprising a shaft (2) equipped with blades (3) distributed in groups (3a-3g), the blades (3) of each group (3a-3g) being arranged around the shaft (2) in the same plane perpendicular to the longitudinal axis of the shaft (2), and the groups (3a-3g) of blades (3) being spaced out from each other along the longitudinal axis of the shaft (2);
• a stator (4) in the form of a hollow cylinder which is able to receive the rotor (1), this stator (4) comprising, at one end of its longitudinal axis, at least one inlet (5) for a first fluid, at least one inlet (6) for a second fluid and, at the other end of its longitudinal axis, an outlet (7) for the micromixture of the fluids;
• (ii) introduction of at least two fluids, at least one of which is reactive, into the micromixer;
• (iii) recovery at the outlet (7) of the micromixer of a micromixture of the fluids;
• (iv) polymerization of the reactive fluid or fluids.