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“Living”/controlled free radical polymerization of MMA in the presence of cobalt(II) 2-ethylhexanoate: A switch from RAFT to ATRP mechanism by Zhengbiao Zhang; Wei Zhang; Xiulin Zhu; Zhenping Cheng; Jian Zhu is a Materials Science article available to read on EtoBox.

What is “Living”/controlled free radical polymerization of MMA in the presence of cobalt(II) 2-ethylhexanoate: A switch from RAFT to ATRP mechanism about?

## Abstract A metal complex, cobalt(II) 2‐ethylhexanoate (CEH), was added to the system of thermal‐initiated reversible addition‐fragmentation chain transfer (RAFT) polymerization of methyl methacrylate (MMA) with 2‐cyanoprop‐2‐yl 1‐dithionaphthalate (CPDN) as the RAFT agent at 115 °C. The polymerization rate was remarkably enhanced in the presence of CEH in comparison with that in the absence of CEH, and the increase of the CPDN concentration also accelerated the rate of polymerization. The polymerization in the concurrence of CPDN and CEH demonstrated the characters of “living”/controlled free radical polymerization: the number‐average molecular weights (__M__~n~) increasing linearly with monomer conversion, narrow molecular weight distributions (__M__~w~/__M__~n~) and obtained PMMA end‐capped with the CPDN moieties. Meanwhile, CEH can also accelerate the rate of RAFT polymerization of MMA using the PMMA as macro‐RAFT agent instead of CPDN. Similar polymerization profiles were obtained when copper (I) bromide (CuBr)/__N,N,N__′,__N__′′__,N__′′‐pentamethyldiethylenetriamine was used instead of CEH. Extensive experiments in the presence of butyl methacrylate, bis(cyclopentadienyl) c

Who reads “Living”/controlled free radical polymerization of MMA in the presence of cobalt(II) 2-ethylhexanoate: A switch from RAFT to ATRP mechanism?

Author

Zhengbiao Zhang; Wei Zhang; Xiulin Zhu; Zhenping Cheng; Jian Zhu

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Inc.; Wiley (ISSN 0887-624X)

Published

2007

Language

EN

Field

Materials Science (Physical Sciences)