Reverse　atom　transfer　radical　polymerization　of　styrene　was　carried　out　in　a　microemulsion　system　with　2,2′-azobisisobutyronitrile　as　initiator,　CuBr2　and　2′-bipyridine　as　catalyst/ligand　complex,　sodium　dodecyl　sulfate　as　emulsifier　and　1-hexanol　as　co-emulsifier.　The　chosen　system　showed　poor　control　over　molecular　weight　characteristics,　though　the　low　values　of　polydispersity　indexes　of　the　polymer　were　observed.　The　particle　size　was　decreased　with　the　increase　in　the　amount　of　catalyst/ligand　complex.　Additionally,　the　nucleation　prevailed　throughout　the　polymerization　process.　©　2013　Pleiades　Publishing,　Ltd.