We have targeted on new synthetic procedure and polyester design using low temperature polycondensation or click polymerization of ester-containing monomers. Recently, we found non-ionic poly(ester-sulfone) showed anode-selective electrophoresis under the electrophoretic deposition (EPD) condition. In this presentation, we investigated an electrophoretic behavior of polymethacrylate having a sulfonyl group in the side chains and compared with the main chain type of poly(ester-sulfone) we already reported. First, we prepared a new vinyl monomer having a pendent sulfide [2-(ethylthio)ethyl methacrylate (ETEMA)] using esterification of methacryloyl chloride by 2-(ethylthio)ethanol. Subsequently, we carried out conventional radical polymerization of ETEMA but gelation occurred, in which we speculated that the gelation is ascribed to chain transfer to carbon-sulfur during the radical polymerization. Therefore, we applied copper-catalyzed �atom transfer radical polymerization (ATRP)� of ETEMA to control the reactivity of the propagating center as well as the molecular weight. As an example, when we used copper(I) bromide/1,1,4,7,10,10-hexamethyltriethylenetetramine as the catalyst and ethyl 2-bromoisobutyrate as the initiator, expected molecular weight control was attained (Mn=8,3�103, Mw/Mn=1.3). Next, we tried to Oxone� oxidation of poly(ETEMA) to synthesize vinyl polymers containing pendent sulfones. To demonstrate the electrophoretic behavior, anode-selective EPD on stainless steel was investigated from the N,N-dimethylformamide/n-butanol suspension. Coated film using this polymer was transparent, although that using poly(ester-sulfone) was turbid. These fundamental results provide new guideline to fabricate titanium(IV) oxide (TiO2)-based electronic papers as well as self-cleaning materials.

Electrophoretic vinyl polymers via atom transfer radical polymerization of a methacrylate containing sulfide

248th National Meeting (2014)

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