Grafting of n-butyl acrylate and N,N′-dimethyl acrylamide from poly(divinylbenzene) microspheres by RAFT polymerization

Raymond Joso, Martina H. Stenzel, Thomas P. Davis, Christopher Barner-Kowollik, Leonie Barner

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N,N′-Dimethyl acrylamide and n-butyl acrylate have been grafted from crosslinked poly(divinylbenzene) core microspheres by both reversible addition-fragmentation chain transfer (RAFT) polymerization and conventional free radical polymerization. The microspheres were prepared by precipitation polymerization utilizing 55 and 80 wt.% divinylbenzene (DVB), respectively. The RAFT agent cumyl dithiobenzoate (CDB) was utilized and grafting was performed in toluene at 80°C with 2,2′-azoisobutyronitrile (AIBN) as thermal initiator. Particle weights increased up to 6% for poly(n-butyl acrylate) and up to 15% for poly(N,N′-dimethyl acrylamide). Grafting from poly(DVB-55) microspheres results in a higher particle weight increase than grafting from poly(DVB-80) microspheres while using the same RAFT agent concentrations. The particle weight increase is approximately higher by a factor of two. The grafted microspheres were characterized by attenuated total reflection (ATR) IR spectroscopy and scanning electron microscopy.

Original languageEnglish
Pages (from-to)468-471
Number of pages4
JournalAustralian Journal of Chemistry
Issue number6
Publication statusPublished - 3 Aug 2005
Externally publishedYes

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