Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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GMA-Functionalized Reactive Stabilizer for Polymerization of Methyl Methacrylate in Supercritical $CO_2$: Effect of Stabilizer, Initiator and Monomer Concentrations

  • Han, Sang-Hun (Department of Chemical Engineering, Dong-A University) ;
  • Park, Kyung-Kyu (Department of Chemical Engineering, Dong-A University) ;
  • Lee, Sang-Ho (Department of Chemical Engineering, Dong-A University)
  • Published : 2008.02.29
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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 $CO_2$. 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 025 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 $2.7{\mu}m$, whereas the particle size distribution increased from 1.3 to 1.9. The $M_n$ of the PMMA product ranged from 41,600 and 55,800 under typical polymerization conditions. The PMMA particle diameter ranged from 1.8 to $11.0{\mu}m$ and the particle size distribution ranged from 1.4 to 1.8.

Keywords

References

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