SELF-ASSEMBLED AND NANOSTRUCTURED COPOLYMER AGGREGATIONS OF THE TERTIARY AMINE METHACRYLATE BASED TRIBLOCK COPOLYMERS

ÖZCAN Y., Orujalipoor I., Huang Y., BÜTÜN V., Jeng U.

ANALYTICAL LETTERS, vol.48, no.17, pp.2693-2707, 2015 (SCI-Expanded) identifier identifier

  • Publication Type: Article / Article
  • Volume: 48 Issue: 17
  • Publication Date: 2015
  • Doi Number: 10.1080/00032719.2015.1046552
  • Journal Name: ANALYTICAL LETTERS
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Page Numbers: pp.2693-2707
  • Keywords: Block copolymer, DLS, Dynamic light scattering, Micelles, SAXS, Small-angle X-ray scattering, AQUEOUS-SOLUTION PROPERTIES, SMALL-ANGLE SCATTERING, BLOCK-COPOLYMERS, MICELLES, SAXS, HOMOPOLYMERS, DIBLOCK, MEDIA
  • Eskisehir Osmangazi University Affiliated: Yes

Abstract

The micellization behavior of novel tertiary amine methacrylate-based ABA type triblock copolymers formed by poly[2-(dimethylamino)ethyl methacrylate] [PDMA] middle block and poly[2-(diethylamino)ethyl methacrylate] [PDEA] or poly[2-(diisopropylamino)ethyl methacrylate] [PDPA] side blocks, PDPA(m)-b-PDMA(n)-b-PDPA(l), and PDEA(m)-b-PDMA(n)-b-PDEA(l) was investigated. Both types of triblock copolymers were water-soluble and had potential for various applications due to their self-assembled and the bottom-up nanoscale micellar construction. The micellar aggregations of the triblock copolymers in aqueous solutions with varying comonomer ratios, molecular weights, temperatures, and pH values were investigated by small-angle X-ray scattering and dynamic light scattering. Compact micellar aggregations were obtained as 0.5 weight percent solutions at 20-21 degrees C and pH 8.67 to 9.05, and characterized as polydispersed spherical core-shells. One group of triblock copolymer micelles had PDPA-cores with radii from 18 to 21 angstrom and PDMA-shell thicknesses of 89-105 angstrom, whereas the other group had PDEA-core spherical micelles with core radii of 60-62 angstrom and a PDMA-shell thicknesses of 64-66 angstrom.