Synthesis of ABC type miktoarm star copolymers by triple click chemistry


ISKIN B., YILMAZ G., Yagci Y.

POLYMER CHEMISTRY, cilt.2, sa.12, ss.2865-2871, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 2 Konu: 12
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1039/c1py00352f
  • Dergi Adı: POLYMER CHEMISTRY
  • Sayfa Sayıları: ss.2865-2871

Özet

An ABC type miktoarm star copolymer possessing polystyrene (PS), poly(epsilon-caprolactone) (PCL) and poly(ethylene glycol) (PEG) arms was synthesized by combining existing triple click chemistries, namely thiol-ene, copper catalyzed azide-alkyne cycloaddition (CuAAC) and Diels-Alder (DA) reactions. For this purpose, a core (1-(allyloxy)-3-azidopropan-2-yl (anthracen-9-ylmethyl) succinate) with allyl, azide and anthracene functionalities was synthesized in two steps with high yields. Then, polymers with corresponding clickable sites, namely omega-thiol polystyrene (PS-SH), alpha-alkyne poly(epsilon-caprolactone) (alkyne-PCL) and omega-maleimide poly(ethylene glycol) (Me-PEG-MI), were independently prepared. As the first step of the grafting onto process, PS-SH was thiol-ene clicked onto the core to yield PS-N-3-Ant. Finally, alkyne-PCL and Me-PEG-MI were bonded to PS-N-3-Ant either in a sequential or a one-pot in situ manner using CuAAC and DA click reactions. All intermediates, related polymers at different stages and final PS-PCL-PEG miktoarm star copolymer were characterized by H-1 NMR, FT-IR, and GPC analyses.