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Inverse microemulsion polymerization of acrylamide in the presence of hexamethylenetetramine

✍ Scribed by Jaroslav Bartoň; Martina Stillhammerová

Publisher
John Wiley and Sons
Year
1996
Tongue
English
Weight
378 KB
Volume
197
Category
Article
ISSN
1022-1352

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✦ Synopsis

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.

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