Modelling of Spray Polymerisation Processes

Abstract

Summary Spray polymerisation is a technique to carry out polymerisations in a highly efficient manner. As experimental optimisation of process parameters is tedious, simulations of the processes inside a single droplet are desirable. Today's models used in spray polymerisation assume ideal mixing and thus do not resolve the particle state along the radius. In this contribution we derive a single particle model for the case of free radical polymerisation, which spatially resolves the physical and chemical processes. The model allows for predicting inhomogeneity of the polymeric product as a function of drying conditions. The state of the polymer is calculated using the method of moments.

Experimental Investigation and Numerical Simulation of Spray Processes

“…Details can be found in [15] and. [16] The mass transfer across the interface for a liquid boundary particle i is modelled by…”

Viscosity function of a fast reactive polymerization-Aqueous solution of acrylic acid in a rheometer

“…Here a common spray dryer is used as a continuous reactor to produce powder polymers in one but complex coupled process. Some patents and researches are dealing with spray polymerization and the use of acrylic acid as a monomer is closely related to the work of Krüger . In order to overcome the low residence time in common spray dryers for spray polymerization, a conditioning step has to be introduced, so the chain propagation starts with or even before the atomization of the reactive liquid.…”