A new PDMS macromonomer stabilizer for dispersion polymerization of styrene in supercritical carbon dioxide | Zendy

Wang Ruolei | Zendy; Cheung H. Michael | Zendy

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A new PDMS macromonomer stabilizer for dispersion polymerization of styrene in supercritical carbon dioxide

Author(s) -

Wang Ruolei,

Cheung H. Michael

Publication year - 2004

Publication title -

journal of applied polymer science

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.575

H-Index - 166

eISSN - 1097-4628

pISSN - 0021-8995

DOI - 10.1002/app.20476

Subject(s) - dispersion polymerization , macromonomer , styrene , materials science , polymerization , polystyrene , polymer chemistry , supercritical fluid , supercritical carbon dioxide , radical polymerization , stabilizer (aeronautics) , chemical engineering , copolymer , chemistry , polymer , organic chemistry , composite material , engineering , mechanical engineering

Free radical polymerization of styrene in supercritical CO 2 requires addition of a surfactant to produce polystyrene (PS) in high conversion and molecular weight with well‐defined particle sizes. In this work, we examined a new stabilizer that can provide effective stabilization for the polymerization of styrene. A commercially available poly(dimethylsiloxane) macromonomer has been employed as a stabilizer for dispersion polymerization of PS in scCO 2 . The reactions were conducted in a 225‐mL stainless steel autoclave over the temperature range 60–80°C and under pressures of 1,500 to 3,000 psi. After 2–12 h of polymerization, the conversion determined by gravimetrical method was between 20 and 80%. These preliminary results suggest that this macromonomer offers satisfactory stabilization for the styrene system. © 2004 Wiley Periodicals, Inc. J Appl Polym Sci 93: 545–549, 2004

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