文献类型：期刊文献

英文题名：Polymer Networks Assembled by Host-Guest Inclusion between Adamantyl and β-Cyclodextrin Substituents on Poly(acrylic acid) in Aqueous Solution

作者：Li, Li[1];Guo, Xuhong[1];Wang, Jie[1];Liu, Peng[1];Prud'homme, Robert K.[2];May, Bruce L.[3];Lincoln, Stephen F.[3]

机构：[1]E China Univ Sci & Technol, State Key Lab Chem Engn, Shanghai 200237, Peoples R China;[2]Princeton Univ, Dept Chem Engn, Princeton, NJ 08544 USA;[3]Univ Adelaide, Sch Chem & Phys, Adelaide, SA 5005, Australia

年份：2008

卷号：41

期号：22

起止页码：8677

外文期刊名：MACROMOLECULES

收录：;EI(收录号：20085111786812);WOS:【SCI-EXPANDED(收录号:WOS:000261003700058)】；

基金：We gratefully acknowledge NSFC Grant 20774030 and the Australian Research Council for support of this work. Xuhong Guo acknowledges the support of this work from Shanghai Shuguang Plan Project 06SG35, Shanghai Pujiang Talent Project 07PJ14022, and the 111 Project (B08021).

语种：英文

外文关键词：Nuclear magnetic resonance spectroscopy - Viscosity - Carboxylic acids - Activation energy - Solutions

摘要：Polymer networks have been constructed through host-guest inclusion between beta-cyclodextrin (beta-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 beta-CD and ADen groups were studied by rheology and 2D H-1 NOESY NMR spectroscopy. The maximum viscosity of the mixture of beta-CD substituted PAA (beta-CDPAA) and ADen substituted PAA (ADenPAA) occurred at a 1:1 beta-CD:ADen substituent ratio which confirmed their binary inclusion. The viscosity of the mixture of the two polymers decreased upon addition of native beta-CD due to its ability to compete favorably with the beta-CD substituents of beta-CDPAA in the inclusion of the ADen substituents of ADenPAA and the consequent disintegration of the polymer network. The theological properties of the polymer networks were temperature sensitive. In the temperature range 10-35 degrees C, the storage modulus and the loss modulus obeyed a time-temperature superposition. The horizontal and vertical temperature shift factors, a(T) and b(T), 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 H-1 NOESY NMR studies showed the ADen substituent to be included within the native beta-CD and beta-CD substituent cavities.