TY - JOUR
T1 - Solution properties of well-defined 2-(dimethylamino)ethyl methacrylate-based (co)polymers
T2 - A viscometric approach
AU - Ydens, Isabelle
AU - Moins, Sébastien
AU - Degée, Philippe
AU - Dubois, Philippe
PY - 2005/7/1
Y1 - 2005/7/1
N2 - Well-defined poly(2-(dimethylamino)ethyl methacrylate)-based (co)polymers with various molar masses were synthesized by atom transfer radical polymerization (ATRP) using CuBr ligated with 1,1,4,7,10,10- hexamethyltriethylenetetramine (HMTETA) as catalyst, and ethyl 2-bromoisobutyrate (EBiB) or α-methyl, ω-(2-bromoisobutyrate) poly(ethylene glycol) (mPEGx-BiB) as (macro)initiator. The solution properties of these (co)polymers were investigated by viscometry either in pure water or in concentrated buffer solutions. It comes out that reduced viscosity in pure water is strongly affected by the molar mass of poly(2-(dimethylamino) ethyl methacrylate) block but also by the quaternization degree of tertiary amino groups. In fact, a polyelectrolyte effect can only be detected when the charge density per macromolecule reaches a critical value either in terms of molar mass or quaternization degree. Fitting of viscometry data according to either Huggins or Fuoss and Fedors equation also allows calculating the intrinsic viscosity and approaching the overlap concentration.
AB - Well-defined poly(2-(dimethylamino)ethyl methacrylate)-based (co)polymers with various molar masses were synthesized by atom transfer radical polymerization (ATRP) using CuBr ligated with 1,1,4,7,10,10- hexamethyltriethylenetetramine (HMTETA) as catalyst, and ethyl 2-bromoisobutyrate (EBiB) or α-methyl, ω-(2-bromoisobutyrate) poly(ethylene glycol) (mPEGx-BiB) as (macro)initiator. The solution properties of these (co)polymers were investigated by viscometry either in pure water or in concentrated buffer solutions. It comes out that reduced viscosity in pure water is strongly affected by the molar mass of poly(2-(dimethylamino) ethyl methacrylate) block but also by the quaternization degree of tertiary amino groups. In fact, a polyelectrolyte effect can only be detected when the charge density per macromolecule reaches a critical value either in terms of molar mass or quaternization degree. Fitting of viscometry data according to either Huggins or Fuoss and Fedors equation also allows calculating the intrinsic viscosity and approaching the overlap concentration.
KW - 2-(Dimethylamino)ethyl methacrylate
KW - Atom transfer radical polymerization
KW - Polycations
KW - Polyelectrolyte effect
KW - Viscometry behavior
UR - http://www.scopus.com/inward/record.url?scp=17644410071&partnerID=8YFLogxK
U2 - 10.1016/j.eurpolymj.2005.02.002
DO - 10.1016/j.eurpolymj.2005.02.002
M3 - Article
AN - SCOPUS:17644410071
SN - 0014-3057
VL - 41
SP - 1502
EP - 1509
JO - European Polymer Journal
JF - European Polymer Journal
IS - 7
ER -