Add time:08/22/2019         Source:sciencedirect.com

An aqueous based technique for producing uniform, thin, passive films of poly(methyl methacrylate) (PMMA) and poly(GLYCIDYL ACRYLATE (cas 106-90-1)) (PGA) on stainless steel electrodes has been developed. A cathodic free radical polymerisation mechanism is proposed based upon the results of cyclic voltammetry (CV), mechanistic electro-polymerisation and gel permeation chromatography (GPC) experiments. The polymerisation yield was increased by a synergistic relationship between sulphuric acid and potassium persulphate initiators, proposed to involve the formation of long-lived radical species. Termination reactions are believed to be inhibited by the formation of co-ordination complexes between the growing polymer chain and sulphuric acid. The mechanism accounts for the broad molecular weight distribution, cross-linking and post-electrolysis polymerisation, where polymer continued to form after the current flow ceased.

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