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Mixed solutions of hydrophobically modified graft and block copolymers

Karlberg, Maria LU ; Thuresson, Krister LU ; Piculell, Lennart LU and Lindman, Björn LU (2004) In Colloids and Surfaces A: Physicochemical and Engineering Aspects 236(1-3). p.159-164
Abstract
Phase separation temperatures and viscosities of dilute and semidilute aqueous mixtures of hydrophobically modified graft and block copolymers have been studied. The graft copolymer was hydrophobically modified ethyl(hydroxyethyl)cellulose (HM-EHEC), and the block copolymers were hydrophobically modified poly(ethylene glycol) (HM-PEG) with diblock (DB) or triblock (TB) structures, i.e., modified at one or both ends, respectively. For comparison, viscosity measurements were made also on mixtures of TB with HM-HEC, and on systems where one of the polymers was unmodified (i.e. HM-EHEC/PEG or TB/EHEC). All results indicate mixed hydrophobic associations between graft and block copolymers. Moderate viscosity enhancements were found on addition... (More)
Phase separation temperatures and viscosities of dilute and semidilute aqueous mixtures of hydrophobically modified graft and block copolymers have been studied. The graft copolymer was hydrophobically modified ethyl(hydroxyethyl)cellulose (HM-EHEC), and the block copolymers were hydrophobically modified poly(ethylene glycol) (HM-PEG) with diblock (DB) or triblock (TB) structures, i.e., modified at one or both ends, respectively. For comparison, viscosity measurements were made also on mixtures of TB with HM-HEC, and on systems where one of the polymers was unmodified (i.e. HM-EHEC/PEG or TB/EHEC). All results indicate mixed hydrophobic associations between graft and block copolymers. Moderate viscosity enhancements were found on addition of HM-PEG to HM-EHEC, and the effects were larger for TB than for DB. The viscosity changes were quite sensitive to the concentration of HM-EHEC. (C) 2004 Elsevier B.V. All rights reserved. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
Hydrophobically modified copolymers, Graft copolymer, Block copolymer
in
Colloids and Surfaces A: Physicochemical and Engineering Aspects
volume
236
issue
1-3
pages
159 - 164
publisher
Elsevier
external identifiers
  • wos:000221608200019
  • scopus:1942542145
ISSN
0927-7757
DOI
10.1016/j.colsurfa.2004.01.035
language
English
LU publication?
yes
id
358040ab-9bb8-4f8e-89f4-b54c65564e64 (old id 154105)
date added to LUP
2007-07-11 13:41:12
date last changed
2017-01-01 06:38:09
@article{358040ab-9bb8-4f8e-89f4-b54c65564e64,
  abstract     = {Phase separation temperatures and viscosities of dilute and semidilute aqueous mixtures of hydrophobically modified graft and block copolymers have been studied. The graft copolymer was hydrophobically modified ethyl(hydroxyethyl)cellulose (HM-EHEC), and the block copolymers were hydrophobically modified poly(ethylene glycol) (HM-PEG) with diblock (DB) or triblock (TB) structures, i.e., modified at one or both ends, respectively. For comparison, viscosity measurements were made also on mixtures of TB with HM-HEC, and on systems where one of the polymers was unmodified (i.e. HM-EHEC/PEG or TB/EHEC). All results indicate mixed hydrophobic associations between graft and block copolymers. Moderate viscosity enhancements were found on addition of HM-PEG to HM-EHEC, and the effects were larger for TB than for DB. The viscosity changes were quite sensitive to the concentration of HM-EHEC. (C) 2004 Elsevier B.V. All rights reserved.},
  author       = {Karlberg, Maria and Thuresson, Krister and Piculell, Lennart and Lindman, Björn},
  issn         = {0927-7757},
  keyword      = {Hydrophobically modified copolymers,Graft copolymer,Block copolymer},
  language     = {eng},
  number       = {1-3},
  pages        = {159--164},
  publisher    = {Elsevier},
  series       = {Colloids and Surfaces A: Physicochemical and Engineering Aspects},
  title        = {Mixed solutions of hydrophobically modified graft and block copolymers},
  url          = {http://dx.doi.org/10.1016/j.colsurfa.2004.01.035},
  volume       = {236},
  year         = {2004},
}