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Type: Journal article
Title: Polymer networks assembled by host−guest inclusion between adamantyl and β-cyclodextrin substituents on poly(acrylic acid) in aqueous solution
Other Titles: Polymer networks assembled by host-guest inclusion between adamantyl and beta-cyclodextrin substituents on poly(acrylic acid) in aqueous Solution
Author: Li, L.
Guo, X.
Wang, J.
Liu, P.
Prud'homme, R.
May, B.
Lincoln, S.
Citation: Macromolecules, 2008; 41(22):8677-8681
Publisher: Amer Chemical Soc
Issue Date: 2008
ISSN: 0024-9297
Statement of
Li Li, Xuhong Guo, Jie Wang, Peng Liu, Robert K. Prud’homme, Bruce L. May and Stephen F. Lincoln
Abstract: Polymer networks have been constructed through host−guest inclusion between β-cyclodextrin (β-CD) and 1-(2-aminoethyl)amidoadmantyl (ADen) substituents on poly(acrylic acid) (PAA). The structure of the networks and the host−guest interactions between the β-CD and ADen groups were studied by rheology and 2D 1H NOESY NMR spectroscopy. The maximum viscosity of the mixture of β-CD substituted PAA (β-CDPAA) and ADen substituted PAA (ADenPAA) occurred at a 1:1 β-CD:ADen substituent ratio which confirmed their binary inclusion. The viscosity of the mixture of the two polymers decreased upon addition of native β-CD due to its ability to compete favorably with the β-CD substituents of β-CDPAA in the inclusion of the ADen substituents of ADenPAA and the consequent disintegration of the polymer network. The rheological properties of the polymer networks were temperature sensitive. In the temperature range 10−35 °C, the storage modulus and the loss modulus obeyed a time−temperature superposition. The horizontal and vertical temperature shift factors, aT and bT, obeyed a simple Arrhenius relationship for which the activation energies were found to be 70.3 ± 0.4 and −2.2 ± 0.1 kJ mol−1, respectively. 2D 1H NOESY NMR studies showed the ADen substituent to be included within the native β-CD and β-CD substituent cavities.
DOI: 10.1021/ma8020147
Grant ID: ARC
Appears in Collections:Aurora harvest
Chemistry publications
Environment Institute publications

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