title: Effect of inclusion complexation with cyclodextrin on the cloud point of poly(2-(dimethylamino)ethyl methacrylate) solution.
abstract: We investigated the influence of addition of cyclodextrin (CD) on the cloud point of poly(2-(dimethylamino)ethyl methacrylate) (PDMAEMA) aqueous solution. Both beta-CD and randomly methylated beta-cyclodextrin (RM-beta-CD) raised the cloud point of PDMAEMA solution; by contrast, the addition of alpha-CD or gamma-CD did not affect the cloud point of PDMAEMA solution. The inclusion complexation between side group of PDMAEMA and RM-beta-CD was confirmed by NMR experiments. The cloud point of PDMAEMA solution was raised gradually with the increase of concentration of RM-beta-CD. On the basis of inclusion complexation equilibrium, we deduced an equation, which clearly described the relationship between cloud point and concentration of RM-beta-CD. This analysis will provide an important theoretic guide for other related research. In comparison with copolymerization with another monomer, such a supramolecular approach avoids a series of synthesis and facilitates fine-tuning of cloud point.
authors.affiliation: State Key Laboratory of Supramolecular Structure and Materials, Jilin University, Changchun 130012, China.
authors.forename: Yu
authors.initials: Y
authors.lastname: Zhao
authors.forename: Kai
authors.initials: K
authors.lastname: Guo
authors.forename: Chunyu
authors.initials: C
authors.lastname: Wang
authors.forename: Liyan
authors.initials: L
authors.lastname: Wang