In situ study of electrocopolymerization of acrylamide,formaldehyde, and N,N′-methylenebisacrylamide |
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| Authors: | M A Karpenko A A Karpenko L G Kolzunova |
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| Institution: | (1) Institute of Chemistry, Far East Division, Russian Academy of Sciences, pr. Stoletiya Vladivostoka 159, Vladivostok, 690022, Russia;(2) Institute of Marine Biology, Far East Division, Russian Academy of Sciences, ul. Palchevskogo 17, Vladivostok, 690041, Russia |
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| Abstract: | An apparatus and procedure for real-time in situ investigations of monomer electropolymerization in solution using optical microscopy with differential interference and phase contrast have been designed. The kinetics of electropolymerization of an acrylamide-formaldehyde monomer mixture in aqueous solution has been studied. An induction period of electropolymerization was fixed and evaluated for the first time. Growth of the polymer film after disconnection has been visualized. The dynamics of this phenomenon is evaluated, and possible reasons are discussed. Anisotropic mechanical stresses, arising in the polymer film during electropolymerization, have been found and characterized. The mechanism that is responsible for the formation of a dense near-cathode layer has been revealed. The formation of a zinc sublayer during electropolymerization has been examined. Reasons for the roughness of the near-electrode surface of the polymer film and for high adhesion of the electrodeposited polymer film to the metal have been established. |
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| Keywords: | electropolymerization in situ studies optical microscopy acrylamide and N N′ -methylenebisacrylamide film formation kinetics induction period postpolymerization |
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