TY - JOUR
T1 - Synthesis of a3B3-type polystyrene-poly (methyl methacrylate) miktoarm star polymers via combination of stable free radical and atom transfer radical polymerization routes
AU - Durmaz, Hakan
AU - Aras, Sermin
AU - Hizal, Gurkan
AU - Tunca, Umit
PY - 2005
Y1 - 2005
N2 - An A3B3-type miktoarm star polymer was prepared utilizing a "core-out" method via combination of stable free radical polymerization (SFRP) and atom transfer radical polymerization (ATRP). First, SFRP of styrene was carried out by using a miktofunctional initiator, benzene-1,3,5-tricarboxylic acid tris{3-(2-bromo-2-methyl-propionyloxy)-2- methyl-2-[2-phenyl-2-(2,2,6,6-tetramethylpiperidin-1-yloxy)ethoxy-carbonyl] propyl} ester, at 125°C. Second, previously obtained polystyrene (A 3-type PSt) precursor with three bromine functionalities in the core was used as a macroinitiator for ATRP of methyl methacrylate (MMA) in the presence of Cu(I)Cl and pentamethyldiethylenetriamine at 90°C in order to give an A3B3-type miktoarm star polymer, (PSt) 3(-PMMA)3, with controlled molecular weight and moderate polydispersity (Mw/Mn < 1.41). The obtained polymers were characterized by gel-permeation chromatography and 1H-NMR.
AB - An A3B3-type miktoarm star polymer was prepared utilizing a "core-out" method via combination of stable free radical polymerization (SFRP) and atom transfer radical polymerization (ATRP). First, SFRP of styrene was carried out by using a miktofunctional initiator, benzene-1,3,5-tricarboxylic acid tris{3-(2-bromo-2-methyl-propionyloxy)-2- methyl-2-[2-phenyl-2-(2,2,6,6-tetramethylpiperidin-1-yloxy)ethoxy-carbonyl] propyl} ester, at 125°C. Second, previously obtained polystyrene (A 3-type PSt) precursor with three bromine functionalities in the core was used as a macroinitiator for ATRP of methyl methacrylate (MMA) in the presence of Cu(I)Cl and pentamethyldiethylenetriamine at 90°C in order to give an A3B3-type miktoarm star polymer, (PSt) 3(-PMMA)3, with controlled molecular weight and moderate polydispersity (Mw/Mn < 1.41). The obtained polymers were characterized by gel-permeation chromatography and 1H-NMR.
KW - Atom transfer radical polymerization (ATRP)
KW - Miktoarm star polymer
KW - Stable free radical polymerization (SFRP)
UR - http://www.scopus.com/inward/record.url?scp=21244500226&partnerID=8YFLogxK
U2 - 10.1163/1568555053993970
DO - 10.1163/1568555053993970
M3 - Article
AN - SCOPUS:21244500226
SN - 1385-772X
VL - 8
SP - 203
EP - 210
JO - Designed Monomers and Polymers
JF - Designed Monomers and Polymers
IS - 3
ER -