Journal
POLYMER INTERNATIONAL
Volume 50, Issue 10, Pages 1162-1169Publisher
WILEY-BLACKWELL
DOI: 10.1002/pi.751
Keywords
hydrophobic zwitterionic monomer; polyacrylamide; associative polymer; free radical polymerization
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The nucleophilic ring opening of dicyanoketene ethylene acetal by tertiary amino monomers leads to an hydrophobic zwitterionic monomer [(dimethylammonioethoxy)dicyanoethenolate]propyl-methacrylamide (DADPMA) characterized by a very high dipole moment. Hydrophobically modified water soluble polymers have been prepared by classical radical polymerization of acrylamide and DADPMA either in homogeneous medium (water/ethanol mixtures) or in micellar solution (water containing sodium dodecylsulphate (SDS)). The copolymers obtained have a high molecular weight (M-omega = 2-5 x 10(6) g mol(-1)) and are water soluble for a content of DADPMA lower than 1% mole/mole. The properties of the copolymers in aqueous solution depend on the synthesis conditions, especially on the ratio ethanol:zwitterionic monomer. (C) 2001 Society of Chemical Industry.
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