Micellization behavior of tertiary amine-methacrylate-based block copolymers characterized by small-angle X-ray scattering and dynamic light scattering

Ozcan Y., İDE S., Jeng U., BÜTÜN V., Lai Y., Su C.

MATERIALS CHEMISTRY AND PHYSICS, vol.138, pp.559-564, 2013 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 138
  • Publication Date: 2013
  • Doi Number: 10.1016/j.matchemphys.2012.12.019
  • Journal Name: MATERIALS CHEMISTRY AND PHYSICS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.559-564
  • Keywords: Polymers, Light scattering, Small-angle scattering, Chemical synthesis, AQUEOUS-SOLUTION PROPERTIES, CROSS-LINKED MICELLES, DIBLOCK COPOLYMER, AGGREGATION BEHAVIOR, HOMOPOLYMERS, POLYMERS, BINDING
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

We have studied the micellization behavior of tertiary amine methacrylate-based diblock copolymers, comprising the hydrophobic poly[2-(diethylamino)ethyl methacrylate] (PDEA) and hydrophilic/polyelectrolyte poly[2-(dimethylamino)ethyl methacrylate] (PDMA) blocks. Revealed by small-angle X-ray scattering (SAXS) and dynamics light scattering, micelle size of the PDMA(m)-b-PDEA(n) diblock copolymer in aqueous solution depends sensitively on the comonomer ratio n/m, molecular weight M-w, solution temperature, and solution pH values. Aggregation number is found to follow an empirical relation of N proportional to (n/m)(1.6), disregarding the molecular mass. With n/m = 0.5, M-w approximate to 12,000, and pH = 7.6, the diblock copolymer forms spherical core-shell micelles at 23 degrees C, with a PDEA-core radius of 52 angstrom, a PDMA-shell thickness of 27 angstrom and an aggregation number of 127. (C) 2012 Elsevier B.V. All rights reserved.