Mid-ir Real-time Monitoring of the Carbocationic Polymerization of Isobutylene and Styrene
The in-situ monitoring of the living carbocationic polymerization of isobutylene (IB) and styrene (St) with a fiber optic Attenuated Total Reflection (ATR) probe in the mid-IR "fingerprint" range is reported here for the first time. Monomer consumption was followed by the disappearance of the C=C stretching for both IB and St, and the C−H bending of the CH3-group in IB. The formation of polyisobutylene (PIB) was also monitored by tracing the asymmetrical doublet characteristic of C−H bending of the t-butyl groups of the PIB. Conversion measurements by conventional off-line gravimetry correlated well with the new technique.
Puskas, Judit; Lanzendörfer, Michael G.; and Pattern, Wayne E., "Mid-ir Real-time Monitoring of the Carbocationic Polymerization of Isobutylene and Styrene" (1998). Chemical and Biomolecular Engineering Faculty Research. 535.