Photoresponsive poly(methyl methacrylate)(2)-(polystyrene)(2) miktoarm star copolymer containing an azobenzene moiety at the core

Erdogan T., Gungor E., Durmaz H., Hizal G., Tunca U.

JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY, cilt.44, sa.4, ss.1396-1403, 2006 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 44 Sayı: 4
  • Basım Tarihi: 2006
  • Doi Numarası: 10.1002/pola.21253
  • Dergi Adı: JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.1396-1403
  • Anahtar Kelimeler: atom transfer radical polymerization, azobenzene, cis- and trans-isomerization, miktoarm star polymer, nitroxide-mediated free radical polymerization, TRANSFER RADICAL POLYMERIZATION, RING-OPENING POLYMERIZATION, BLOCK-COPOLYMERS, METHYL-METHACRYLATE, POLYMERS, COMBINATION, INITIATOR, DENDRIMERS, MOLECULES, CHLORIDES
  • İstanbul Teknik Üniversitesi Adresli: Evet

Özet

We prepared a novel miktoarm star copolymer with an azobenzene unit at the core via combination of atom transfer radical polymerization (ATRP) and nitroxide-mediated free radical polymerization (NMP) routes. For this purpose, first, miktofunctional initiator, 3, with tertiary bromide (for ATRP) and 2,2,6,6-tetramethylpiperidin-1-yloxy (TEMPO) (for NMP) functionalities and an azobenzene moiety at the core was synthesized. The initiator 3 thus obtained was used in the subsequent living radical polymerization routes such as ATRP of MMA and NMP of St, respectively, to give A(2)B(2) type miktoarm star copolymer, (PMMA)(2)-(PSt)(2) with an azobenzene unit at the core with controlled molecular weight and low polydispersity (M(w)/M(n) < 1.15). The photoresponsive properties of 3 and (PMMA)(2)-(PSt)(2) miktoarm star copolymer were investigated. (c) 2006 Wiley Periodicals, Inc.