In-line reaction monitoring of a methyl methacrylate and N,N-dimethylacrylamide copolymerization reaction using near-infrared spectroscopy

C.P. Beyers, H.F.M. Boelens, B. Klumperman, J.A. Westerhuis

Research output: Contribution to journalArticleAcademicpeer-review

8 Citations (Scopus)

Abstract

Fast and accurate monitoring of monomer concentration during copolymerization reactions is of much interest. It is known that near-infrared spectroscopy (NIRS) can be used to monitor polymerization reactions. Here, a free radical solution copolymerization reaction between methyl methacrylate and N,N-dimethylacrylamide is considered. NIR spectra were measured in-line with a transflectance probe. The spectra of both involved monomers are very similar, making monitoring with NIRS challenging. It is shown that the NIRS calibration can be set up with only a few (5) off-line measured mixtures. Several validation methods for such a NIRS calibration model are discussed and tested. NIRS is used to follow conversion of the two monomers in a copolymerization reaction on-line.
Original languageEnglish
Pages (from-to)863-869
Number of pages7
JournalApplied Spectroscopy
Volume58
Issue number7
DOIs
Publication statusPublished - 2004

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