Micelles and 'reverse micelles' with a novel water-soluble diblock copolymer

BÜTÜN V., SÖNMEZ KARTAL M., Yarligan S., Taktak F. F., Atay A., BÜTÜN ŞENGEL S.

Polymer, cilt.49, sa.19, ss.4057-4065, 2008 (SCI-Expanded, Scopus) identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 49 Sayı: 19
  • Basım Tarihi: 2008
  • Doi Numarası: 10.1016/j.polymer.2008.07.026
  • Dergi Adı: Polymer
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.4057-4065
  • Anahtar Kelimeler: Micelles, Reverse micelles, Water-soluble
  • Uşak Üniversitesi Adresli: Hayır

Özet

A series of poly[2-(diisopropylamino)ethyl methacrylate]-block-poly[2-(N-morpholino)ethyl methacrylate], [PDPA-b-PMEMA], have been synthesized by using group transfer polymerization. These novel PDPA-b-PMEMA diblock copolymers dissolved molecularly in aqueous solution at low pH (<6.0) due to the protonation of all tertiary amine residues of both blocks and formed PDPA-core micelles at pH 7.5 by PMEMA block forming the micelle coronas. On the other hand, it was also observed that these diblock copolymers formed near-monodisperse 'reverse micelles', PMEMA-core micelles, in n-alkanes with or without requiring cosolvent depending on comonomer ratios. Dynamic light scattering studies indicated monodisperse or near-monodisperse micelles in both cases. The intensity-average radii of the PDPA-core and the PMEMA-core micelles were between 10 nm and 17 nm (polydispersity index, μ2/Γ2 < 0.08) and between 10 nm and 13 nm in n-hexane (μ2/Γ2 < 0.09), respectively. © 2008 Elsevier Ltd. All rights reserved.