Precision Control in Radical Polymerization-Control of Molecular Weight, Stereochemistry, and Monomer Sequence-

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  • Kamigaito Masami
    Department of Applied Chemistry, Graduate School of Engi-neering, Nagoya University
  • Satoh Kotaro
    Department of Applied Chemistry, Graduate School of Engi-neering, Nagoya University

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  • ラジカル重合における精密制御―分子量，立体構造，モノマー配列の制御―
  • ラジカル ジュウゴウ ニ オケル セイミツ セイギョ ブンシリョウ リッタイ コウゾウ モノマー ハイレツ ノ セイギョ

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Abstract

This review article describes precision control of molecular weight, stereochemistry, and monomer sequence in radical polymerization. For molecular weight control, metal-catalyzed living radical polymerization, which is originated from metal-catalyzed Kharasch addition reaction, has been developed by designing the catalysts and has become applicable for a wide variety of vinyl monomers including methacrylates, acrylates, styrenes, acrylamides, vinyl acetate, etc. While the control of stereochemistry cannot be achieved by these metal catalysts, the stereochemical control based on the interaction of solvents or added Lewis acids has been combined with various living radical polymerizations for the simultaneous control of molecular weight and tacticity . A possibility of monomer sequence control has now been suggested by developing metal-catalyzed radical addition reaction to metal-catalyzed radical polyaddition of designed monomers for sequence-regulated vinyl polymers.

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