Synthesis of A(3)B(3)-type polystyrene-poly(methyl methacrylate) miktoarm star polymers via combination of stable free radical and atom transfer radical polymerization routes


Durmaz H., Aras S., Hizal G., Tunca U.

DESIGNED MONOMERS AND POLYMERS, cilt.8, sa.3, ss.203-210, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 8 Sayı: 3
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1163/1568555053993970
  • Dergi Adı: DESIGNED MONOMERS AND POLYMERS
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.203-210
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

An A(3)B(3)-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-phenyl2-(2,2,6,6-tetramethylpiperidin- 1-yloxy)ethoxy-carbonyl]propyl) ester, at 125 degrees C. Second, previously obtained polystyrene (A(3)-type PSt) precursor with three bromine functionallities in the core was used as a macroinitiator for ATRP of methyl methacrylate (MMA) in the presence of Cu(I)CI and pentamethyldiethylenetriamine at 90 degrees C in order to give an A(3)B(3)-type miktoarm star polymer, (PSt)3(PMMA)3, with controlled molecular weight and moderate polydispersity (M-w/M-n < 1.41), The obtained polymers were characterized by gel-permeation chromatography and H-1-NMR.