Supramolecular assemblies of amphiphilic PMMA-block-PAA stars in aqueous solutions

Julkaisun otsikon käännös: Supramolecular assemblies of amphiphilic PMMA-block-PAA stars in aqueous solutions.

Tutkimustuotos: ArtikkelijulkaisuArtikkelivertaisarvioitu

Abstrakti

Self-assembling properties of an amphiphilic star block copolymer, 4-arm (PMMA-b-PAA)4 with poly(Me methacrylate) core and poly(acrylic acid) shell, have been investigated in aq. solns. The stars have been obsd. to aggregate in a complex manner in aq. solns., depending on the presence or absence of salt. Screening of the electrostatic repulsion between the polyelectrolyte blocks by adding salt triggers the formation of worm-like micelles. The presence of worm-like micelles in saline solns. was revealed by Kratky anal. of the light scattering data. The coexistence of different micellar morphologies was visualized by direct imaging by cryoTEM. Due to the balance between the electrostatic and hydrophobic interactions semidilute solns. show interesting rheol. properties. Shear thinning behavior of salt-free solns. and their time-dependent gelation have been obsd., thus indicating the strong tendency of the polymers to aggregate. [on SciFinder(R)]
Julkaisun otsikon käännösSupramolecular assemblies of amphiphilic PMMA-block-PAA stars in aqueous solutions.
Alkuperäiskielienglanti
LehtiPolymer
Vuosikerta47
Numero19
Sivut6524-6535
Sivumäärä12
ISSN0032-3861
DOI - pysyväislinkit
TilaJulkaistu - 2006
OKM-julkaisutyyppiA1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä, vertaisarvioitu

Lisätietoja

M1 - Copyright (C) 2010 American Chemical Society (ACS). All Rights Reserved.
CAPLUS AN 2006:875215(Journal)

Tieteenalat

  • 116 Kemia

Siteeraa tätä