Surface plasmon resonance study of the interaction of a beta-cyclodextrin polymer and hydrophobically modified poly(N-isopropylacrylamide).
Surface plasmon resonance (SPR) technique is used to follow, both in real time and in situ, the association between a physically adsorbed polymer of beta-cyclodextrin (pbetaCD) and different hydrophobically modified poly(N-isopropylacrylamide) (PNIPAM) copolymers containing either adamantyl or dodecyl groups. This association is due to the complex formation between the hydrophobic groups and the betaCD cavities. Therefore, the adsorbed amount of PNIPAM onto the pbetaCD layer depends on the substituent and on its substitution level. The association and dissociation rate constants are evaluated from the kinetics of PNIPAM adsorption. An estimation of the association constants leads to values higher than 10(4) M(-1), reflecting the strong interaction between these polymers.
Wintgens
V
V
Laboratoire de Recherche sur les Polymères, LRP, C.N.R.S. UMR 7581, 2-8 rue Henri Dunant, 94320 Thiais, France. wintgens@glvt-cnrs.fr
Amiel
C
C
D000180:Acrylic Resins / Q000737:chemistry*; D000327:Adsorption; D001665:Binding Sites; D002482:Cellulose / Q000737:chemistry*; D003505:Cyclodextrins / Q000737:chemistry*; D057927:Hydrophobic and Hydrophilic Interactions; D007700:Kinetics; D020349:Surface Plasmon Resonance
D000180:Acrylic Resins; D003505:Cyclodextrins; C041953:cyclodextrin polymer; C052970:poly-N-isopropylacrylamide; D002482:Cellulose