Polymeric networks assembled by adamantyl and ß-Cyclodextrin Substituted Poly(acrylate)s: Host-Guest interactions, and the effects of ionic strength and extent of substitution

The construction of polymer networks through host-guest complexation between the β-cyclodextrin (βCD) substituents of 6^A-(1-(2- aminoethyl)amino)-6^A-deoxy-β-cyclodextrin 2, 3, and 6% randomly substituted poly(acrylate) (PAAβCDen) and the adamantyl (AD) substituents of 1-(2-aminoethyl)amidoadamantyl 2, 3, and 6% randomly substituted poly(acrylate) (pAAADen) is reported. A 2D ¹H NOESY NMR spectroscopic study shows the formation of host-guest complexes by the βCD and AD substituents. This is characterized by a complexation constant, K₁ = 3020 ± 60 mol^-1 dm³, for 3% substituted PAAβCDen and PAAADen as shown by isothermal titration calorimetry. The viscosity ofa2wt%equimolar mixture of 3% randomly substituted PAAβCDen and PAAADen reaches a maximum at [NaCl] = 0.1 mol dm^-3, and the viscosity and the storage and loss moduli (G' and G") increase with the increase in degree of substitution from 2 to 6%.