Mixed solutions of hydrophobically modified graft and block copolymers

Maria Karlberg; Krister Thuresson; Lennart Piculell; Björn Lindman

doi:10.1016/j.colsurfa.2004.01.035

Mixed solutions of hydrophobically modified graft and block copolymers

Maria Karlberg, Krister Thuresson, Lennart Piculell, Björn Lindman

Physical Chemistry

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Pages (from-to)	159-164
Journal	Colloids and Surfaces A: Physicochemical and Engineering Aspects
Volume	236
Issue number	1-3
DOIs	https://doi.org/10.1016/j.colsurfa.2004.01.035
Publication status	Published - 2004

Subject classification (UKÄ)

Physical Chemistry

Free keywords

Hydrophobically modified copolymers
Graft copolymer
Block copolymer

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10.1016/j.colsurfa.2004.01.035

Cite this

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title = "Mixed solutions of hydrophobically modified graft and block copolymers",

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.",

keywords = "Hydrophobically modified copolymers, Graft copolymer, Block copolymer",

author = "Maria Karlberg and Krister Thuresson and Lennart Piculell and Bj{\"o}rn Lindman",

year = "2004",

doi = "10.1016/j.colsurfa.2004.01.035",

language = "English",

volume = "236",

pages = "159--164",

journal = "Colloids and Surfaces A: Physicochemical and Engineering Aspects",

issn = "0927-7757",

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}

TY - JOUR

T1 - Mixed solutions of hydrophobically modified graft and block copolymers

AU - Karlberg, Maria

AU - Thuresson, Krister

AU - Piculell, Lennart

AU - Lindman, Björn

PY - 2004

Y1 - 2004

N2 - 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.

AB - 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.

KW - Hydrophobically modified copolymers

KW - Graft copolymer

KW - Block copolymer

U2 - 10.1016/j.colsurfa.2004.01.035

DO - 10.1016/j.colsurfa.2004.01.035

M3 - Article

SN - 0927-7757

VL - 236

SP - 159

EP - 164

JO - Colloids and Surfaces A: Physicochemical and Engineering Aspects

JF - Colloids and Surfaces A: Physicochemical and Engineering Aspects

IS - 1-3

ER -

Mixed solutions of hydrophobically modified graft and block copolymers

Abstract

Subject classification (UKÄ)

Free keywords

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