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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
SPECIES IN ALUMINOXANE USING A CROSSLINKED POLYMER BEARING BULKY PHENOXY GROUPS Article 14 June 2021 MAGNETIC SILICA PARTICLES FUNCTIONALIZED WITH GUANIDINE DERIVATIVES FOR
MICROWAVE-ASSISTED TRANSESTERIFICATION OF WASTE OIL Article Open access 01 September 2021 REVERSIBLE COMPLEXATION MEDIATED POLYMERIZATION OF METHACRYLATES USING AMINE CATALYSTS IN AQUEOUS
HETEROGENEOUS SYSTEMS Article 04 October 2022 ARTICLE PDF REFERENCES * N. Tsubokawa, K. Maruyama, Y. Sone, and M. Shimomura, _Colloid Polym. Sci._, in press. * N. Tsubokawa, _Nippon Gomu
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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
Download citation * Issue Date: 01 June 1989 * DOI: https://doi.org/10.1295/polymj.21.475 SHARE THIS ARTICLE Anyone you share the following link with will be able to read this content: Get
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