Effect of Hydrophobic Modification on Phase Behaviour and Rheology in Mixtures of Oppositely Charged Polyelectrolytes
(1996) In Langmuir 12(2). p.530-537- Abstract
- Phase behavior and rheology of polymer mixtures comprising aqueous solutions of oppositely charged polyelectrolytes are investigated. Emphasis is put on the effects of hydrophobic modification of the polymers and addition of salt. The associative phase separation usually observed when mixing oppositely charged polyelectrolytes is effectively prevented over a large miscibility region for the hydrophobically modified polymers. Also, in the extended one-phase region, the viscosity is 3-4 orders of magnitude higher for mixed polyelectrolyte systems compared to that observed for either one of the polymers. Addition of ordinary electrolytes to the mixture decreases the viscosity strongly, and at higher electrolyte contents a phase separation is... (More)
- Phase behavior and rheology of polymer mixtures comprising aqueous solutions of oppositely charged polyelectrolytes are investigated. Emphasis is put on the effects of hydrophobic modification of the polymers and addition of salt. The associative phase separation usually observed when mixing oppositely charged polyelectrolytes is effectively prevented over a large miscibility region for the hydrophobically modified polymers. Also, in the extended one-phase region, the viscosity is 3-4 orders of magnitude higher for mixed polyelectrolyte systems compared to that observed for either one of the polymers. Addition of ordinary electrolytes to the mixture decreases the viscosity strongly, and at higher electrolyte contents a phase separation is induced. A mechanism explaining the observations is proposed. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/30856
- author
- Thuresson, Krister LU ; Nilsson, Svante and Lindman, Björn
- organization
- publishing date
- 1996
- type
- Contribution to journal
- publication status
- published
- subject
- in
- Langmuir
- volume
- 12
- issue
- 2
- pages
- 530 - 537
- publisher
- The American Chemical Society (ACS)
- external identifiers
-
- scopus:0003227009
- ISSN
- 0743-7463
- language
- English
- LU publication?
- yes
- id
- b52bb70d-b2d8-4524-a10d-23020f6aae1e (old id 30856)
- date added to LUP
- 2016-04-01 12:36:04
- date last changed
- 2022-04-13 21:11:55
@article{b52bb70d-b2d8-4524-a10d-23020f6aae1e,
abstract = {{Phase behavior and rheology of polymer mixtures comprising aqueous solutions of oppositely charged polyelectrolytes are investigated. Emphasis is put on the effects of hydrophobic modification of the polymers and addition of salt. The associative phase separation usually observed when mixing oppositely charged polyelectrolytes is effectively prevented over a large miscibility region for the hydrophobically modified polymers. Also, in the extended one-phase region, the viscosity is 3-4 orders of magnitude higher for mixed polyelectrolyte systems compared to that observed for either one of the polymers. Addition of ordinary electrolytes to the mixture decreases the viscosity strongly, and at higher electrolyte contents a phase separation is induced. A mechanism explaining the observations is proposed.}},
author = {{Thuresson, Krister and Nilsson, Svante and Lindman, Björn}},
issn = {{0743-7463}},
language = {{eng}},
number = {{2}},
pages = {{530--537}},
publisher = {{The American Chemical Society (ACS)}},
series = {{Langmuir}},
title = {{Effect of Hydrophobic Modification on Phase Behaviour and Rheology in Mixtures of Oppositely Charged Polyelectrolytes}},
volume = {{12}},
year = {{1996}},
}