Raman Spectroscopy in Process Control

It has been shown that Raman spectral measurements can be used for the on-line monitoring of monomer conversion during polymerization processes. Because of the structure of the spectra, distinct peaks separated by more than 30 cm-1, and because the sample solutions are composed of monomers and polymers in a solvent, this is an application area where Raman spectroscopy can be used for quantitative measurements. Either solvent peaks or monomer/polymer peaks that remain constant throughout the process can be used as internal reference peaks to remove the effects of the laser intensity variations.

Here are some examples of this application. Please click on the links below.

Rubber Production
Polystyrene Production