Aishun Ding and Guolin Lu contributed equally to this work.
SET-LRP synthesis of PMHDO-g-PNIPAM well-defined amphiphilic graft copolymer
Article first published online: 5 DEC 2012
Copyright © 2012 Wiley Periodicals, Inc.
Journal of Polymer Science Part A: Polymer Chemistry
Volume 51, Issue 5, pages 1091–1098, 1 March 2013
How to Cite
Ding, A., Lu, G., Guo, H., Zheng, X. and Huang, X. (2013), SET-LRP synthesis of PMHDO-g-PNIPAM well-defined amphiphilic graft copolymer. J. Polym. Sci. A Polym. Chem., 51: 1091–1098. doi: 10.1002/pola.26469
- Issue published online: 24 JAN 2013
- Article first published online: 5 DEC 2012
- Manuscript Accepted: 5 NOV 2012
- Manuscript Received: 2 OCT 2012
- graft copolymers;
- single electron transfer-living radical polymerization (SET-LRP);
A well-defined amphiphilic graft copolymer, consisting of hydrophobic polyallene-based backbone and hydrophilic poly(N-isopropylacrylamide) (PNIPAM) side chains, was prepared by the combination of living coordination polymerization, single electron transfer-living radical polymerization (SET-LRP), and the grafting-from strategy. First, the double-bond-containing backbone was prepared by [(η3-allyl)NiOCOCF3]2-initiated living coordination polymerization of 6-methyl-1,2-heptadiene-4-ol (MHDO). Next, the pendant hydroxyls in every repeating unit of poly(6-methyl-1,2-heptadiene-4-ol) (PMHDO) homopolymer were treated with 2-chloropropionyl chloride to give PMHDO-Cl macroinitiator. Finally, PNIPAM side chains were grown from PMHDO backbone via SET-LRP of N-isopropylacrylamide initiated by PMHDO-Cl macroinitiator in N,N-dimethylformamide/2-propanol using copper(I) chloride/tris(2-(dimethylamino)ethyl)amine as catalytic system to afford PMHDO-g-PNIPAM graft copolymers with a narrow molecular weight distribution (Mw/Mn = 1.19). The critical micelle concentration (cmc) in water was determined by fluorescence probe technique and the effects of pH and salinity on the cmc of PMHDO-g-PNIPAM were also investigated. The micellar morphology was found to be spheres using transmission electron microscopy. © 2012 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem, 2013