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https://hdl.handle.net/2440/23540
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Type: | Journal article |
Title: | Rheology control by modulating hydrophobic and inclusion associations in modified poly(acrylic acid) solutions |
Author: | Guo, X. Abdala, A. May, B. Lincoln, S. Khan, S. Prud'homme, R. |
Citation: | Polymer, 2006; 47(9):2976-2983 |
Publisher: | Elsevier |
Issue Date: | 2006 |
ISSN: | 0032-3861 1873-2291 |
Statement of Responsibility: | Xuhong Guo, Ahmed A. Abdala, Bruce L. May, Stephen F. Lincoln, Saad A. Khan and Robert K. Prud'homme |
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. © 2006 Elsevier Ltd. All rights reserved. |
Keywords: | poly(acrylic acid) rheology inclusion association |
Rights: | Copyright © 2006 Elsevier Ltd All rights reserved. |
DOI: | 10.1016/j.polymer.2006.03.006 |
Description (link): | http://www.elsevier.com/wps/find/journaldescription.cws_home/30466/description#description |
Published version: | http://dx.doi.org/10.1016/j.polymer.2006.03.006 |
Appears in Collections: | Aurora harvest 6 Chemistry publications Environment Institute publications |
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