The synthesis and solution behaviors of novel amphiphilic block copolymers based on D-galactopyranose and 2-(dimethylamino)ethyl methacrylate

ARSLAN H., Zirtil O., BÜTÜN V.

EUROPEAN POLYMER JOURNAL, cilt.49, sa.12, ss.4118-4129, 2013 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 49 Sayı: 12
  • Basım Tarihi: 2013
  • Doi Numarası: 10.1016/j.eurpolymj.2013.09.018
  • Dergi Adı: EUROPEAN POLYMER JOURNAL
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.4118-4129
  • Anahtar Kelimeler: Stimuli-responsive amphiphilic block copolymers, 6-O-methacryloyl-1,2:3,4-di-O-isopropylidene-D-galactopyranose, 2-(N,N-dimethylamino)ethyl methacrylate, Atom transfer radical polymerization, RAFT POLYMERIZATION, RADICAL POLYMERIZATION, HYPERBRANCHED GLYCOPOLYMERS, TRIBLOCK COPOLYMERS, GENE DELIVERY, VINYL-ACETATE, DIBLOCK, RECOGNITION, BRUSHES, SOLVENT
  • Eskişehir Osmangazi Üniversitesi Adresli: Evet

Özet

A series of novel stimuli-responsive AB, ABA, and BAB type block copolymers based on 6-O-methacryloyl-1,2:3,4-di-O-isopropylidene-D-galactopyranose (MAIpGP:A block) and 2-(N,N-dimethylamino)ethyl methacrylate (DMAEMA: B block) were synthesized via ATRP techniques using ethyl 2-bromoisobutyrate (EBiB) as monofunctional ATRP initiator in the case of diblock copolymer and diethyl meso-2,5-dibromoadipate (DEDBA) as bifunctional ATRP initiator in the case of triblock copolymers. The PMAlpGP blocks of the AB, ABA, and BAB type linear block copolymers were converted to water soluble PMAGP blocks via deprotection process under mild acidic conditions. Both proton NMR and DLS studies demonstrated that block copolymers were temperature-sensitive, whereby the lower critical solution temperature (LCST) of polymers varied with the polymerization degrees of comonomers in the block copolymers. LCST was determined to be between similar to 35 degrees C and 55 degrees C depending on the type and the comonomer compositions of the block copolymers. It was observed that an increase on the percentage of hydrophilic PMAGP block in block copolymer caused an increase on the LCST value as expected. (C) 2013 Elsevier Ltd. All rights reserved.