Hiromu Taguchi

Vinyl Polymerization Initiated by the Cycloamylose/Metal Ion System in Water

Abstract The polymerization of vinyl monomers, methyl methacrylate (MMA), benzyl methacrylate (BMA), styrene, and acrylonitrile has been carried out using the cycloamylose/metal ion systems in water. We have found that the α-, β-, and γ-cyclodextrins have an ability to initiate the polymerization of MMA and BMA in combination with Cu(II) or Fe(III) ions.

Vinyl Polymerization Initiated by the Methylated Cyclodextrin/Metal Ion System in Water

Abstract The polymerization of the vinyl monomers methyl methacrylate (MMA), benzyl methacrylate, and styrene, has been carried out using methylated cyclodextrins, for example, heptakis(2,6,0-dimethyl)-β-cyclodextrin, and heptakis (2,3,6-0-trimethyl)-β-cyclodextrin. These methylated cyclodextrins were found to initiate polymerization of the vinyl monomers in combination with water and a small amount of Cu(II) ion, in analogy with β-cyclo-dextrin (β-CD). Generally, the initiating ability of the methylated cyclodextrins/Cu(II) ion system for the polymerization of MMA was larger than that of the β-CD/Cu(II) ion system. Moreover, the introduction of a phosphate group into a methylated cyclodextrin molecule was found to increase the initiating ability for the polymerization of MMA.

Vinyl Polymerization Initiated by Cycloheptaamylose Phosphate Ammonium Salt/Metal Ion System in Water

Abstract Cycloheptaamylose phosphate ammonium salt (β-PCD) was found to initiate the radical polymerization of vinyl monomers in combination with water and a small amount of Cu(n) or Fe(III) ion, in analogy with the cycloheptaamylose (β-cyclodextrin:β-CD). The initiating ability of this system was larger than that of the β-CD/metal ion system. Detailed investigations were conducted in order to elucidate a plausible initiation mechanism of this polymerization.