TY - JOUR
T1 - Photoresponsive poly(methyl methacrylate)2-(polystyrene) 2 miktoarm star copolymer containing an azobenzene moiety at the core
AU - Erdogan, Tuba
AU - Gungor, Eda
AU - Durmaz, Hakan
AU - Hizal, Gurkan
AU - Tunca, Umit
PY - 2006/2/15
Y1 - 2006/2/15
N2 - 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, mikto-functional 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 A2B2 type miktoarm star copolymer, (PMMA)2-(PSt)2 with an azobenzene unit at the core with controlled molecular weight and low polydispersity (M w/Mn < 1.15). The photoresponsive properties of 3 and (PMMA)2-(PSt)2 miktoarm star copolymer were investigated.
AB - 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, mikto-functional 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 A2B2 type miktoarm star copolymer, (PMMA)2-(PSt)2 with an azobenzene unit at the core with controlled molecular weight and low polydispersity (M w/Mn < 1.15). The photoresponsive properties of 3 and (PMMA)2-(PSt)2 miktoarm star copolymer were investigated.
KW - Atom transfer radical polymerization
KW - Azobenzene
KW - Cis- and trans-isomerization
KW - Miktoarm star polymer
KW - Nitroxide-mediated free radical polymerization
UR - http://www.scopus.com/inward/record.url?scp=33644607884&partnerID=8YFLogxK
U2 - 10.1002/pola.21253
DO - 10.1002/pola.21253
M3 - Article
AN - SCOPUS:33644607884
SN - 0887-624X
VL - 44
SP - 1396
EP - 1403
JO - Journal of Polymer Science, Part A: Polymer Chemistry
JF - Journal of Polymer Science, Part A: Polymer Chemistry
IS - 4
ER -