Development of Controlled/Living Radical Polymerization in Emulsion Systems

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  • KITAYAMA Yukiya
    Graduate School of Engineering, Kobe University, Present address: Graduate School of Engineering, Osaka Prefecture University

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  • 乳化重合系における制御/リビングラジカル重合の発展

Abstract

<p>Controlled/living radical polymerization（ CLRP） is a powerful approach to create a wide range of functional polymers possessing pre-determined molecular weights and complex molecular architectures. Recently, enormous efforts have been made for development of CLRP in emulsion polymerization systems since the system comprises multiple different phases including monomer droplets, micelles（ particles）, and aqueous media. In this review, recent developments of organotellurium-mediated living radical polymerization（ TERP） in emulsion polymerization systems（ emulsion TERP） are described. It has been clarified that the control of particle nucleation step is key of successful polymerization in the emulsion TERP. The effects of various polymerization conditions（ temperatures, stirring rates, monomer hydrophilicity, and catalyst hydrophilicity） on the polymerization control as well as particle nucleation were investigated. Furthermore, the synthesis of well-defined ultra-high molecular weight polystyrene was also demonstrated by taking advantages derived from the radical segregation effect of emulsion TERP.</p>

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