Seiya Kikuchi, Yougen Chen, Eiji Ichinohe
Jun 23, 2016
Citations
0
Influential Citations
15
Citations
Journal
Macromolecules
Abstract
The syntheses of linear, cyclic, and star-shaped poly(N,N-diethylacrylamide)s (PDEAAms) have been studied in order to clarify the topological effect on their thermoresponsive properties. For the group transfer polymerization of N,N-diethylacrylamide using tris(pentafluorophenyl)borane (B(C6F5)3) as the organocatalyst, the α-, ω-, and α,ω-end-functionalizations of the PDEAAms with well-controlled molecular weights and narrow polydispersities were quantitaively produced using the silyl ketene aminals with hydroxyl, ethynyl, and vinyl groups as functional initiators and 2-phenyl acrylate derivatives with hydroxyl, ethynyl, and bromo groups as functional terminators. The ω-end-functionalized PDEAAm with the azido group and the α,ω-end-functionalized PDEAAm with the ethynyl and azido groups were used as the starting materials for the inter- and intramolecular copper(I)-catalyzed click reactions leading to the 3-armed star-shaped and cyclic PDEAAms (s3-PDEAAm and c-PDEAAm, respectively). In order to eliminate t...