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Nadège Brun, Itab Youssef, Marie-Claire Chevrel, David Chapron, Cornélius Schrauwen, Sandrine Hoppe, Patrice Bourson and Alain Durand In situ monitoring of styrene polymerization using Raman spectroscopy. Multi-scale approach of homogeneous and heterogeneous polymerization processes Journal of Raman Spectroscopy 44

Article first published online: 31 MAR 2013 | DOI: 10.1002/jrs.4279

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Free radical polymerization of styrene was monitored in situ by combining Raman spectroscopy to other experimental techniques (gravimetry and rheology). Three different processes were investigated: bulk, emulsion and miniemulsion polymerization. A complete analysis of the evolution of Raman spectrum during the course of reaction showed that a lot of information about molecular dynamics could be extracted and related to chemical phenomena. In addition, we report for the first time the coupling of Raman spectroscopy to a rheometer in order to monitor styrene bulk polymerization both at the scale of chemical bonds and at the scale of macroscopic phenomena (viscosity variation).

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