Session: General Topics: New Synthesis & Characterization of Polymers:

Emulsion polymerization is the basis of multiple industrial products from specialized additives to make polymer processable to paints & coatings decorating and protecting interior and exterior surfaces. The technology behind emulsion polymerization is multi-component and multi-stage with initiators, surfactants, monomers and medium contributing to the resulting polymer structure and properties. Monitoring is generally performed via sampling and off-line analyses. Dynamic monitoring is desirable for immediate feedback, adjustment opportunities, as well as enhanced process safety. Among applicable methodologies are infrared and Raman based on vibrational spectroscopy.
This paper presents results obtained with a ThermoFisher Scientific FT-NIR analyzer capable of supporting four probes simultaneously. Monomer consumption and polymer latex formation are monitored in multi-probe setup configurations. Examples are provided for one and two stage monomer addition.

FT-NIR spectra as a function of time during emulsion polymerization

FT-NIR spectra as a function of time during emulsion polymerization

Dana Garcia

Arkema inc

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