Rheology control by modulating hydrophobic and inclusion associations in modified poly(acrylic acid) solutions

Xuhong Guo, Ahmed Abdala, Bruce L. May, Stephen F. Lincoln, Saad A. Khan, Robert K. Prud'homme

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

The rheology of modified poly(acrylic acid) (PAA) solutions can be tuned by controlling the inclusion interactions between α-cyclodextrins and alkyl hydrophobes. We demonstrate three modes of control: (1) using free cyclodextrins (CD) to displace hydrophobe-hydrophobe association in hydrophobically modified poly(acrylic acid) (HMPAA) polymers-which reduces fluid viscosity, (2) using competitive inclusion interactions where stronger SDS:CD binding can be used to 'unmask' CD:hydropobe inclusion interactions-which increases viscosity, and (3) employing HMPAA inclusion interactions with CD groups grafted to PAA chains (CDPAA)-which produces higher viscosities than purely hydrophobic association systems at the same concentration. The inclusion association between alkyl side-group in HMPAA and CD, either free or grafted onto PAA, obeys a 1-to-1 stoichiometry at low polymer concentrations (<1 wt%). In contrast to purely hydrophobically associating polymers, the CD:hydrophobe interaction is only binary, and, therefore, these associated networks should be ideal model systems to test theoretical predictions for associative fluids.

Original languageEnglish
Pages (from-to)2976-2983
Number of pages8
JournalPolymer
Volume47
Issue number9
DOIs
Publication statusPublished - 19 Apr 2006
Externally publishedYes

Fingerprint

carbopol 940
Cyclodextrins
Rheology
Acrylics
Acids
Association reactions
Viscosity
Polymers
Fluids
Stoichiometry

Keywords

  • Inclusion association
  • Poly(acrylic acid)
  • Rheology

ASJC Scopus subject areas

  • Organic Chemistry
  • Polymers and Plastics

Cite this

Rheology control by modulating hydrophobic and inclusion associations in modified poly(acrylic acid) solutions. / Guo, Xuhong; Abdala, Ahmed; May, Bruce L.; Lincoln, Stephen F.; Khan, Saad A.; Prud'homme, Robert K.

In: Polymer, Vol. 47, No. 9, 19.04.2006, p. 2976-2983.

Research output: Contribution to journalArticle

Guo, Xuhong ; Abdala, Ahmed ; May, Bruce L. ; Lincoln, Stephen F. ; Khan, Saad A. ; Prud'homme, Robert K. / Rheology control by modulating hydrophobic and inclusion associations in modified poly(acrylic acid) solutions. In: Polymer. 2006 ; Vol. 47, No. 9. pp. 2976-2983.
@article{1e815e72e95841c39ad97e822bded212,
title = "Rheology control by modulating hydrophobic and inclusion associations in modified poly(acrylic acid) solutions",
abstract = "The rheology of modified poly(acrylic acid) (PAA) solutions can be tuned by controlling the inclusion interactions between α-cyclodextrins and alkyl hydrophobes. We demonstrate three modes of control: (1) using free cyclodextrins (CD) to displace hydrophobe-hydrophobe association in hydrophobically modified poly(acrylic acid) (HMPAA) polymers-which reduces fluid viscosity, (2) using competitive inclusion interactions where stronger SDS:CD binding can be used to 'unmask' CD:hydropobe inclusion interactions-which increases viscosity, and (3) employing HMPAA inclusion interactions with CD groups grafted to PAA chains (CDPAA)-which produces higher viscosities than purely hydrophobic association systems at the same concentration. The inclusion association between alkyl side-group in HMPAA and CD, either free or grafted onto PAA, obeys a 1-to-1 stoichiometry at low polymer concentrations (<1 wt{\%}). In contrast to purely hydrophobically associating polymers, the CD:hydrophobe interaction is only binary, and, therefore, these associated networks should be ideal model systems to test theoretical predictions for associative fluids.",
keywords = "Inclusion association, Poly(acrylic acid), Rheology",
author = "Xuhong Guo and Ahmed Abdala and May, {Bruce L.} and Lincoln, {Stephen F.} and Khan, {Saad A.} and Prud'homme, {Robert K.}",
year = "2006",
month = "4",
day = "19",
doi = "10.1016/j.polymer.2006.03.006",
language = "English",
volume = "47",
pages = "2976--2983",
journal = "Polymer (United Kingdom)",
issn = "0032-3861",
publisher = "Elsevier BV",
number = "9",

}

TY - JOUR

T1 - Rheology control by modulating hydrophobic and inclusion associations in modified poly(acrylic acid) solutions

AU - Guo, Xuhong

AU - Abdala, Ahmed

AU - May, Bruce L.

AU - Lincoln, Stephen F.

AU - Khan, Saad A.

AU - Prud'homme, Robert K.

PY - 2006/4/19

Y1 - 2006/4/19

N2 - The rheology of modified poly(acrylic acid) (PAA) solutions can be tuned by controlling the inclusion interactions between α-cyclodextrins and alkyl hydrophobes. We demonstrate three modes of control: (1) using free cyclodextrins (CD) to displace hydrophobe-hydrophobe association in hydrophobically modified poly(acrylic acid) (HMPAA) polymers-which reduces fluid viscosity, (2) using competitive inclusion interactions where stronger SDS:CD binding can be used to 'unmask' CD:hydropobe inclusion interactions-which increases viscosity, and (3) employing HMPAA inclusion interactions with CD groups grafted to PAA chains (CDPAA)-which produces higher viscosities than purely hydrophobic association systems at the same concentration. The inclusion association between alkyl side-group in HMPAA and CD, either free or grafted onto PAA, obeys a 1-to-1 stoichiometry at low polymer concentrations (<1 wt%). In contrast to purely hydrophobically associating polymers, the CD:hydrophobe interaction is only binary, and, therefore, these associated networks should be ideal model systems to test theoretical predictions for associative fluids.

AB - The rheology of modified poly(acrylic acid) (PAA) solutions can be tuned by controlling the inclusion interactions between α-cyclodextrins and alkyl hydrophobes. We demonstrate three modes of control: (1) using free cyclodextrins (CD) to displace hydrophobe-hydrophobe association in hydrophobically modified poly(acrylic acid) (HMPAA) polymers-which reduces fluid viscosity, (2) using competitive inclusion interactions where stronger SDS:CD binding can be used to 'unmask' CD:hydropobe inclusion interactions-which increases viscosity, and (3) employing HMPAA inclusion interactions with CD groups grafted to PAA chains (CDPAA)-which produces higher viscosities than purely hydrophobic association systems at the same concentration. The inclusion association between alkyl side-group in HMPAA and CD, either free or grafted onto PAA, obeys a 1-to-1 stoichiometry at low polymer concentrations (<1 wt%). In contrast to purely hydrophobically associating polymers, the CD:hydrophobe interaction is only binary, and, therefore, these associated networks should be ideal model systems to test theoretical predictions for associative fluids.

KW - Inclusion association

KW - Poly(acrylic acid)

KW - Rheology

UR - http://www.scopus.com/inward/record.url?scp=33646168053&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=33646168053&partnerID=8YFLogxK

U2 - 10.1016/j.polymer.2006.03.006

DO - 10.1016/j.polymer.2006.03.006

M3 - Article

AN - SCOPUS:33646168053

VL - 47

SP - 2976

EP - 2983

JO - Polymer (United Kingdom)

JF - Polymer (United Kingdom)

SN - 0032-3861

IS - 9

ER -