Macromolecular Research

The Polymer Society of Korea (한국고분자학회)
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Synthesis of High Molecular Weight 3-Arm Star PMMA by ARGET ATRP

  • Jeon, Hyun-Jeong (Department of Advanced Fiber Engineering, Division of Nano-Systems, Inha University) ;
  • Youk, Ji-Ho (Department of Advanced Fiber Engineering, Division of Nano-Systems, Inha University) ;
  • Ahn, Sung-Hee (Cheil Industries Inc.) ;
  • Choi, Jin-Hwan (Cheil Industries Inc.) ;
  • Cho, Kwang-Soo (Department of Polymer Science and Engineering, Kyungpook National University)
  • Published : 2009.04.25
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Abstract

High molecular weight(MW), 3-arm star poly(methyl methacrylate)(PMMA) with a narrow MW distribution($M_n$=570,000 g/mol, PDI=1.36) was successfully synthesized by activators regenerated by electron transfer(ARGET) atom transfer radical polymerization(ATRP). The polymerization was carried out with a trifunctional initiator/$CuBr_2$/N,N,N',N",N"-pentamethyldiethy lenetriamine(PMDETA) initiator/catalyst system in the presence of a tin(II) 2-ethylhexanoate [$Sn(EH)_2$] reducing agent at $90^{\circ}C$. The concentration of the copper catalyst was as low as 30 ppm, and a high initiation efficiency of the initiating sites was obtained. The chain-end functionality of the high MW, 3-arm star PMMA was confirmed by a chain extension experiment with styrene via ARGET ATRP, using the same catalyst system.

Keywords

References

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