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Inverse microemulsion polymerization of acrylamide in the presence of hexamethylenetetramine
Author(s) -
Bartoň Jaroslav,
Stillhammerová Martina
Publication year - 1996
Publication title -
macromolecular chemistry and physics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.57
H-Index - 112
eISSN - 1521-3935
pISSN - 1022-1352
DOI - 10.1002/macp.1996.021970327
Subject(s) - hexamethylenetetramine , polymerization , microemulsion , acrylamide , polymer chemistry , polymer , chemistry , precipitation polymerization , chemical engineering , nanogel , kinetics , materials science , copolymer , radical polymerization , organic chemistry , drug delivery , pulmonary surfactant , biochemistry , physics , quantum mechanics , engineering
The inverse microemulsion polymerization of acrylamide is retarded in the presence of hexamethylenetetramine. The retardation effect of a given hexamethylenetetramine concentration on the kinetics of the polymerization of acrylamide depends on the pH of compartmentalized water droplets. For non‐crosslinked polymer particles the polymer particle diameter for a given composition of the inverse microemulsion increases in the presence of hexamethylenetetramine, while the relative molecular mass (molecular weight) of the polymer decreases. Depending on the pH value of the compartmentalized water droplets polymer particles with different crosslinking degree (of different swelling index) were obtained. The kinetics of polymerization and the polymer particle characteristics are discussed with respect to the hexamethylenetetramine effect on the stability of dispersed particles in an inverse microemulsion prior to and during the polymerization and in terms of the effect of “in situ” formed hexamethylenetetramine decomposition products and of their reactions with acrylamide and/or acrylamide structural units in the polymer.