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
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.