Dear Ali,
In RAFT the radical is passed on via monomer fragments / function groups leaving the monomer. ATRP, in contrast, has a radical that is localized on a transition metal catalyst. Monomers attach to complex of growing chain and polymerize.
Hope that helps,
Cheers,
Andreas
Dear Ali,
In RAFT the radical is passed on via monomer fragments / function groups leaving the monomer. ATRP, in contrast, has a radical that is localized on a transition metal catalyst. Monomers attach to complex of growing chain and polymerize.
Hope that helps,
Cheers,
Andreas
Hi Ali,
I would recommend you a brochure by Sigma Aldrich that explains both ATRP and RAFT polymerization. This is for me a very good source providing the full knowledge about these thechniques.
http://www.sigmaaldrich.com/content/dam/sigma-aldrich/docs/SAJ/Brochure/1/controlled-radical-polymerization-guide.pdf
ATRP is based on reducing the concentration of living radicals, while RAFT polymerization relays on the chain transferring.
ATRP & RAFT are the most successful controlled radical polymerizations to synthesize both homo and copolymers specially block copolymers. ATRP is based on the reversible oxidative transfer of an atom usually a halogen from a dormant initiator or a polymeric chain to a redox active transition metal salt,thus it transfer, catalyzed and generate an active radical. The main difference of RAFT with ATRP is that RAFT is based on the transfer of activity between polymer chains bearing dithioester moieties and not on the reversible deactivation of growing polymer chains. Mostly dithiocarbonyl derivatives are used as chain transfer agents.
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