Synthesis and characterisation of poly (acrylamide-co-acrylic acid)
Abstract
In this study, poly(acrylamide-co-acrylic acid) was synthesised by polymerising acrylamide (AM) and acid acrylic (AA) in an aqueous solution, using ammonium persulfate as a trigger agent. The polymerisation constant of monomers at different pH values was calculated by the Fineman – Ross method. The experiments have showed that at pH = 2.2, copolymers were richer in acrylic acid, but at pH = 6.2 more acrylamide was observed. This result showed that the rate of AA/AM in copolymers can be controlled to produce a heat-stable gel system of HPAM (partially hydrolysed polyacrylamide) and salt of chromium (III), which are used in oil and gas production to increase productivity.
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