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GMA-functionalized reactive stabilizer for polymerization of methyl methacrylate in supercritical CO2: effect of stabilizer, initiator and monomer concentrations

GMA-functionalized reactive stabilizer for polymerization of methyl methacrylate in supercritical... Glycidyl methacrylate linked poly(dimethylsiloxane) (GMA-PDMS) was synthesized and used as a stabilizer for the dispersion polymerization of methyl methacrylate (MMA) in supercritical CO2. This study examined the effect of the concentrations of the stabilizer, 2,2’-azobisisobutyronitrile (AIBN) initiator, and MMA on the yield, molecular weight, and morphology of the poly(methyl methacrylate) (PMMA) product. PMMA was obtained in 94.6% yield using only 0.87 wt% GMA-PDMS. When the AIBN concentration was increased from 0.25 to 1.06 wt%, the molecular weight and particle size of the PMMA decreased from 56,600 to 21,600 and from 4.1 to 2.7 μm, whereas the particle size distribution increased from 1.3 to 1.9. TheMn of the PMMA product ranged from 41,600 and 55,800 under typical polymerization conditions. The PMMA particle diameter ranged from 1.8 to 11.0 μm and the particle size distribution ranged from 1.4 to 1.8. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Macromolecular Research Springer Journals

GMA-functionalized reactive stabilizer for polymerization of methyl methacrylate in supercritical CO2: effect of stabilizer, initiator and monomer concentrations

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References (26)

Publisher
Springer Journals
Copyright
Copyright © The Polymer Society of Korea and Springer 2008
ISSN
1598-5032
eISSN
2092-7673
DOI
10.1007/bf03218840
Publisher site
See Article on Publisher Site

Abstract

Glycidyl methacrylate linked poly(dimethylsiloxane) (GMA-PDMS) was synthesized and used as a stabilizer for the dispersion polymerization of methyl methacrylate (MMA) in supercritical CO2. This study examined the effect of the concentrations of the stabilizer, 2,2’-azobisisobutyronitrile (AIBN) initiator, and MMA on the yield, molecular weight, and morphology of the poly(methyl methacrylate) (PMMA) product. PMMA was obtained in 94.6% yield using only 0.87 wt% GMA-PDMS. When the AIBN concentration was increased from 0.25 to 1.06 wt%, the molecular weight and particle size of the PMMA decreased from 56,600 to 21,600 and from 4.1 to 2.7 μm, whereas the particle size distribution increased from 1.3 to 1.9. TheMn of the PMMA product ranged from 41,600 and 55,800 under typical polymerization conditions. The PMMA particle diameter ranged from 1.8 to 11.0 μm and the particle size distribution ranged from 1.4 to 1.8.

Journal

Macromolecular ResearchSpringer Journals

Published: Feb 1, 2008

Keywords: polymerization; supercritical CO2; macromonomer

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