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Redox initiated cationic polymerization: Silane-N-aryl heteroaromatic onium salt redox couples

Authors :
James V. Crivello
Julia L. Lee
Source :
Journal of Polymer Science Part A: Polymer Chemistry. 48:4484-4495
Publication Year :
2010
Publisher :
Wiley, 2010.

Abstract

In this article, a new route for the synthesis of N-aryl heteroaromatic onium salts by the direct copper catalyzed arylation of pyridine, substituted pyridines, isoquinoline, and acridine with diaryliodonium salts is described. It was demonstrated that these N-aryl heteroaromatic onium salts undergo facile platinum or rhodium-catalyzed reduction by silanes bearing Si—H groups. The reduction of N-aryl heteroaromatic onium salts generates Bronsted acids. When this redox reaction was carried out in situ in the presence of an appropriate monomer, cationic polymerization was observed. Using this approach, the cationic polymerizations of epoxides, oxetanes, 1,3,5-trioxane, styrene, and vinyl ethers were carried out. The use of optical pyrometry to monitor the redox initiated cationic polymerizations of some representative multifunctional monomers is described.

Details

ISSN :
0887624X
Volume :
48
Database :
OpenAIRE
Journal :
Journal of Polymer Science Part A: Polymer Chemistry
Accession number :
edsair.doi...........69b470eec59c7a53751c5b3495809f7a