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Polymerization of acrylamide in inverse microemulsions under special conditions
Author(s) -
Bartoň Jaroslav
Publication year - 1996
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.19961010108
Subject(s) - acrylamide , polymerization , chemistry , microemulsion , monomer , viscosity , bulk polymerization , aqueous solution , polymer chemistry , styrene , toluene , radical polymerization , materials science , organic chemistry , polymer , pulmonary surfactant , biochemistry , copolymer , composite material
Increasing of Φ aw , the volume fraction of the aqueous phase (water + acrylamide) in inverse microemulsion systems toluene / sodium bis(2‐ethylhexyl) sulfosuccinate (AOT) / water / acrylamide (Set A); toluene / AOT / water / acrylamide / sodium dodecyl sulfate (SDS) (Set AD) and toluene / styrene/ AOT / water / acrylamide (Set AS) leads to an increase of the viscosity. The dependence of the viscosity on Φ aw in the temperature range 20–45°C is characterized by three maxima (at Φ aw Φ25, 45 and 65%). These maxima can be eliminated by an increase of temperature to 50°C (Sets A and AS). The most prominent peak (at Φ aw Φ45%) is preserved at 50°C only for systems of Set AD. The acrylamide polymerization behaviour in Sets A and AD is very similar irrespective of the nature of initiator used (dibenzoyl peroxide and ammonium peroxodisulfate). The rate of polymerization is a complex function of Φ aw . In the presence of styrene (Set AS) a significant retardation of polymerization was observed. The rate of polymerization increases with increasing Φ aw . Viscosity of the inverse dispersion system (Set AD) has no effect on the polymerization rate of acrylamide.