A comparative study of dynamic light and X-ray scatterings on micelles of topological polymer amphiphiles

Brian J. Ree, Jongchan Lee, Yusuke Satoh, Kyungho Kwon, Takuya Isono, Toshifumi Satoh, Moonhor Ree

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Micelles were prepared in organic solvents by using three topological polymer amphiphiles: (i) cyclic poly(n-decyl glycidyl ether-block-2-(2-(2-methoxyethoxy)ethoxy)ethyl glycidyl ether) (c-PDGE-b-PTEGGE) and (ii) its linear analogue (l-PDGE-b-PTEGGE); (iii) linear poly(6-phosphorylcholinehexylthiopropyl glycidyl ether-block-n-dodecanoyl glycidyl ether) (l-PPCGE-b-PDDGE). For the individual micelle solutions, the size and distribution were determined by dynamic light scattering (DLS) and synchrotron X-ray scattering analyses. The synchrotron X-ray scattering analysis further found that c-PDGE-b-PTEGGE forms oblate ellipsoidal micelle in an ethanol/water mixture, l-PDGE-b-PTEGGE makes prolate ellipsoidal micelle in an ethanol/water mixture, and l-PPCGE-b-PDDGE forms cylindrical micelle in chloroform. This comparative study found that there are large differences in the size and distribution results extracted by DLS and X-ray scattering analyses. All possible factors to cause such large differences are discussed. Moreover, a better use of the DLS instrument with keeping its merits is proposed.

Original languageEnglish
Article number1347
JournalPolymers
Volume10
Issue number12
DOIs
StatePublished - 5 Dec 2018

Keywords

  • Amphiphilic cyclic diblock copolymer
  • Amphiphilic linear diblock copolymer
  • Dynamic light scattering
  • Micellar structure
  • Micelle size
  • Size distribution
  • Synchrotron X-ray scattering

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