Fibers and Polymers

The Korean Fiber Society (한국섬유공학회)
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Low Temperature Suspension Polymerization of Methyl Methacrylate for the Preparation of High Molecular Weight Poly(methyl methacrylate)/Silver Nanocomposite Microspheres

  • Yeum, Jeong-Hyun (Department of Natural Fiber Science, Kyungpook National University) ;
  • Ghim, Han-Do (Department of Textile System Engineering, Kyungpook National University) ;
  • Deng, Yulin (School of Chemical and Biomolecular Engineering, Georgia Institute of Technology)
  • Published : 2005.12.01
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Abstract

In order to prepare high molecular weight poly(methyl methacrylate) (PMMA)/silver nanocomposite microspheres, methyl methacrylate was suspension-polymerized in the presence of silver nanoparticles at low temperature with 2,2'-azobis(2,4-dimethylvaleronitrile) as an initiator. The rate of conversion was increased by increasing the initiator concentration. When silver nanoparticles were added, the rate of polymerization decreased slightly. High monomer conversion (about $85\%$) was obtained in spite of low polymerization temperature of $30^{\circ}C$. Under controlled conditions, PMMA/silver microspheres with various number-average degrees of polymerization (6,000-37,000) were prepared. Morphology studies revealed that except for normal suspension microspheres with a smooth surface, a golf ball-like appearance of the microspheres was observed, due to the migration and aggregation of the hydrophilic silver nanoparticles at the sublayer beneath the microsphere's surface.

Keywords

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