Synthesis and characterization of star polymers initiated by hexafunctional discotic initiator through atom transfer radical polymerization

Authors
Citation
Xs. Feng et Cy. Pan, Synthesis and characterization of star polymers initiated by hexafunctional discotic initiator through atom transfer radical polymerization, J POL SC PC, 39(13), 2001, pp. 2233-2243
Citations number
39
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Organic Chemistry/Polymer Science
Journal title
JOURNAL OF POLYMER SCIENCE PART A-POLYMER CHEMISTRY
ISSN journal
0887-624X → ACNP
Volume
39
Issue
13
Year of publication
2001
Pages
2233 - 2243
Database
ISI
SICI code
0887-624X(20010701)39:13<2233:SACOSP>2.0.ZU;2-U
Abstract
A novel hexafunctional discotic initiator, 2,3,6,7,11,12-hexakis(2-bromobut yryloxy)triphenylene (HBTP), was synthesized by the esterification of 2,3,6 ,7,11,12-hexahydroxytriphenylene with 2-bromobutyryl chloride. Atom transfe r radical polymerizations of styrene, methyl acrylate, and n-butyl acrylate were carried out in 50 vol % tetrahydrofuran with HBTP/copper(I) bromide/2 ,2 ' -bipyridyl as an initiation system. The polymers produced had well-con trolled molecular weights and narrow molecular weight distributions (<1.2). On the basis of H-1 NMR spectra of the star polymer and its hydrolyzed pro ducts, we can conclude that the initiator quantitatively initiated the poly merization of vinyl monomers and that a star polymer with a discotic core w as obtained. (C) 2001 John Wiley & Sons, Inc.