Macromolecules, Vol.36, No.24, 9050-9059, 2003
Polymerization of acrylamide in the presence of tetradecyltrimethylammonium bromide surfactant
The polymerization of acrylamide (AAm) and N,N'-methylenebis(acrylamide) (BIS) in the presence of high concentrations of tetradecyltrimethylammonium bromide (TTAB) results in formation of macroporous gels. Prior to polymerization, the presence of AAm monomer shifts the TTAB micelle to the columnar phase transition boundary. The combination of dynamic viscosity measurements and X-ray diffraction shows for high TTAB concentrations that during polymerization TTAB micelles are driven into nanodomains of the hexagonal-columnar phase. X-ray diffraction from lower concentration TTAB samples shows that micelles are limited to a closest separation of 10 rim, apparently due to the presence of the polyacrylamide network.