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/CuBr2/N,N,N′,N′,N′-pentamethyldiethylenetriamine (PMDETA) initiator/catalyst system in the presence of a tin(II) 2-ethylhexanoate [Sn(EH)2] reducing agent at 90 °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.
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Jeon, H.J., Youk, J.H., Ahn, S.H. et al. Synthesis of high molecular weight 3-arm star PMMA by ARGET ATRP. Macromol. Res. 17, 240–244 (2009). https://doi.org/10.1007/BF03218686
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DOI: https://doi.org/10.1007/BF03218686