| 초록 |
Star polymers are a special kind of branched polymers composed of a centeral core and different numbers of linear chains with the properties of low solution or melt viscosities, because their molecular structures behave similar to a solution of hard sphere and exhibit limited chain entanglements, which is beneficial to polymer processing. The synthesis of 4-arm star polymer had been achieved successfully by atom transfer radical emulsion polymerization using n-butyl acrylate(n-BA), methyl methacrylate(MMA), 2-hydroxyethyl methacrylate(HEMA) as acrylic monomers, and pentaerythritol tetrakis(2-bromoisobutyrate) as an initiator. The star polymer was characterized by FT-IR and 1H NMR spectroscopies and GPC, DSC, respectively. |
