Microstructured Modular Reactor for Parallel Gas Phase Catalyst Screening

✍ Scribed by A. Müller; W. Ehrfeld; V. Hessel; H. Löwe; A. Lohf; Th. Richter; M. Hampe; Ch. Hoffmann

• Publisher: John Wiley and Sons
• Year: 2001
• Tongue: German
• Weight: 96 KB
• Volume: 73
• Category: Article
• ISSN: 0009-286X
• DOI: 10.1002/1522-2640(200106)73:6<675::aid-cite6753333>3.0.co;2-x

✦ Synopsis

Phase behavior measurements for terpolymers of styrene, methyl methacrylate (MMA), and glycidyl methacrylate (GMA) in a mixture of supercritical (sc) CO 2 and acetone show that, in case of low molecular weight material (MW~5000 g´mol ±1 ), significant amounts of the polymer may be dissolved at pressures around 300 bar. Based on this finding, terpolymerizations of styrene, MMA, and functional methacrylates such as GMA and 2-hydroxypropyl methacrylate have been carried out in scCO 2 . Almost complete monomer conversion may be reached, e.g. at 120 C, 350 bar and in the presence of 20 wt.% scCO 2 . The reaction kinetics and the polymer molecular weight have been modeled using the program PREDICI Ò . The modeling is exclusively based on kinetic coefficients from separate pulsed laser experiments.