Synthesis and Characterization of Cyclic, Hyperbranched and Graft Polymers Using a Sulfoxide-based Vinyl Protected Macroinimer
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We synthesized hyperbranched, cyclic, and graft polymers using a sulfoxide-based vinyl protected macroinimer. The vinyl protected macroinimer was synthesized via atom transfer radical polymerization (ATRP) using a protected ATRP initiator, which has methacrylic group of double bond protected by sulfoxide. Through thermal sulfoxide cleavage, the macroinimer were deprotected. When the macroinimer is reacted under conventional ATRP conditions, a hyperbranched polymer was synthesized by self-condensing vinyl polymerization (SCVP). On the other hand, a cyclic polymer was synthesized by atom transfer radical cyclization (ATRC) in diluted concentration. Also, if nitroxide-mediated polymerization (NMP) is used, the macroinimer acts as a macromonomer because ATRP initiation does not occur. So, Graft polymer was synthesized via NMP with 4-acetoxy styrene as a comonomer. The synthesized polymer architectures were successfully characterized by SEC, 1H NMR spectroscopy, MALDI TOF-MS.