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Temperature-Dependent Gelation Behaviour of Double Responsive P2VP-b-PEO-b-P(GME-co-EGE) Triblock Terpolymers : A SANS Study

Title data

Karg, Matthias ; Reinicke, Stefan ; Lapp, Alain ; Hellweg, Thomas ; Schmalz, Holger:
Temperature-Dependent Gelation Behaviour of Double Responsive P2VP-b-PEO-b-P(GME-co-EGE) Triblock Terpolymers : A SANS Study.
In: Macromolecular Symposia. Vol. 306-307 (September 2011) Issue 1 . - pp. 77-88.
ISSN 1521-3900
DOI: https://doi.org/10.1002/masy.201000142

Official URL: Volltext

Abstract in another language

Aqueous solutions of a double responsive P2VP62-b-PEO452-b-P(GME36-co-EGE36) triblock terpolymer were investigated by means of small-angle neutron scattering (SANS) in order to derive information about structural changes going along with the temperature triggered gel-sol-gel transition at pH = 7, and the sol-gel transition at pH = 3.5, respectively, observed by rheology. SANS measurements on dilute samples at different pH and temperature confirmed the formation of core-shell-corona micelles under conditions, where only one of the outer blocks is insoluble. In addition, temperature-dependent scattering experiments were performed for higher volume fractions, that is, the concentration range where hydrogels were formed. This allowed us to identify the structural transitions, being responsible for the gel-sol-gel transition at pH = 7, and the structure of the gel phase formed at low pH and elevated temperatures.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: block copolymers; neutron scattering; responsive hydrogels; rheology; smart materials
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry
Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Chemistry > Chair Macromolecular Chemistry II
Faculties
Faculties > Faculty of Biology, Chemistry and Earth Sciences
Result of work at the UBT: Yes
DDC Subjects: 500 Science > 540 Chemistry
Date Deposited: 28 Apr 2015 08:33
Last Modified: 28 Apr 2015 08:33
URI: https://eref.uni-bayreuth.de/id/eprint/11545