Journal
POLYMER
Volume 46, Issue 15, Pages 5484-5493Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymer.2005.05.031
Keywords
atom transfer radical polymerization (ATRP); emulsion polymerization; latex
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The emulsion atom transfer radical polymerization (ATRP) of 2-ethylhexyl methacrylate (EHMA) was carried out with ethyl 2-bromoisobutyrate (EBiB) as an initiator and copper bromide (CuBr)/4,4'-dinonyl-2,2'-bipyridyl (dNbpy) as a catalyst system. The effects of surfactant type and concentration, temperature, monomer/initiator ratio, and CuBr2 addition on the system livingness, polymer molecular weight control, and latex stability were examined in detail. It was found that the polymerization systems with Tween 80 and Brij 98 as surfactants at 30 degrees C gave the best latex stability. The polymer samples prepared under these conditions had narrow molecular weight distributions (M-w/M-n= 1.1-1.2) and linear relationships of number-average molecular weight versus monomer conversion. (c) 2005 Elsevier Ltd. All rights reserved.
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