Graft polymerization of acrylamide from ultrafine silica particles by use of a redox system consisting of ceric ion and reducing groups on the surface

ABSTRACT Radical graft polymerization from ultrafine silica surface was investigated. A redox system consisting of ceric ion and the silica particles carrying reducing groups, such as

alcoholic hydroxyl, amino, and mercapto groups, was capable of initiating the radical polymerization of acrylamide (AAm). The introduction of alcoholic hydroxyl groups onto the surface was

achieved by the treatment of the silica with 3-glycidoxypropyltrimethoxysilane in acidic condition in water. Amino or mercapto groups were introduced onto the silica by reactions of surface

silanol groups with 3-aminopropyltriethoxysilane or 3-mercaptopropyltrimethoxysilane, respectively. The initiating ability of the redox system changed, depending on the reducing groups on

the silica surface, in the following order: alcoholic hydroxyl group<amino group<mercapto group. In the above redox polymerization, polyacrylamide was grafted onto the silica based on

the propagation of the polymer from the radicals formed by the reaction of ceric ion with alcoholic hydroxyl, amino, or mercapto groups. The percentage of grafting onto the silica reached

about 25%. The silica obtained from the redox graft polymerization gave a stable colloidal dispersion in water. SIMILAR CONTENT BEING VIEWED BY OTHERS REMOVAL OF MONONUCLEAR ALKYLALUMINUM

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Book Company, New York, N.Y., 1973. Google Scholar  Download references AUTHOR INFORMATION AUTHORS AND AFFILIATIONS * Department of Applied Chemistry, Faculty of Engineering, Niigata

University, Norio Tsubokawa, Kazue Maruyama & Yasuo Sone * Advanced Technology Research Center, Technical Headquarters, Mitsubishi Heavy Industries Ltd., Masato Shimomura Authors * Norio

Tsubokawa View author publications You can also search for this author inPubMed Google Scholar * Kazue Maruyama View author publications You can also search for this author inPubMed Google

Scholar * Yasuo Sone View author publications You can also search for this author inPubMed Google Scholar * Masato Shimomura View author publications You can also search for this author

inPubMed Google Scholar RIGHTS AND PERMISSIONS Reprints and permissions ABOUT THIS ARTICLE CITE THIS ARTICLE Tsubokawa, N., Maruyama, K., Sone, Y. _et al._ Graft Polymerization of Acrylamide

from Ultrafine Silica Particles by Use of a Redox System Consisting of Ceric Ion and Reducing Groups on the Surface. _Polym J_ 21, 475–481 (1989). https://doi.org/10.1295/polymj.21.475

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shareable link Sorry, a shareable link is not currently available for this article. Copy to clipboard Provided by the Springer Nature SharedIt content-sharing initiative KEYWORDS * Ultrafine

Particle * Silica * Radical Grafting * Redox Polymerization * Ceric Ion * Acrylamide * Silane Coupling Agent * Colloidal Dispersion