Reactive extrusion

REX is a process that uses an extruder, normally Co-TSE as chemical reactor instead of a typical steel vessel, combining mixing, devolatilisation and the chemical reaction in one step. Reactions like polymerisation, compatibilisation, backbone functionalisation and controlled degradation are the most usual applications.

Our solutions

REX is a complex process that requires an in-depth study of the reaction and its conditions. The main factors to be controlled will depend on each type of reaction but can be summarised in:

  • Residence time and screw profile to match the kinetics of the reaction.
  • Dosing protocol of each reagent order to ensure that the reaction takes place.
  • Temperature control.
  • Devolatilisation of undesired by-products.
  • Accurate dosing of liquids and solids to reach the appropriate Stoichiometry.

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Technical advice and assistance

We offer our experience and assistance in the following areas:

  • Synthesis of polymers at pilot plant scale in batches and via reactive extrusion.
  • Reactive compatibilisation of two polymers.
  • To adapt batch reaction polymerisation to the reactive extrusion process.
  • To ensure a complete reaction in Co-TSE by modifying screw profile and processing parameters.
  • Upscaling the process at industrial facilities.

Other services

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Luis Roca

Compounding