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Surface functionalization of Si 3 N 4 nanoparticles by graft polymerization of glycidyl methacrylate and styrene
Author(s) -
Luo Ying,
Rong Min Zhi,
Zhang Ming Qiu,
Friedrich Klaus
Publication year - 2006
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.24011
Subject(s) - glycidyl methacrylate , monomer , polymerization , materials science , polymer chemistry , emulsion polymerization , styrene , surface modification , nanoparticle , grafting , polymer , methacrylate , epoxy , chemical engineering , copolymer , composite material , nanotechnology , engineering
To improve dispersibility and interfacial interaction of nano‐Si 3 N 4 particles in epoxy‐based composites, graft of glycidyl methacrylate (GMA) and styrene (St)/GMA onto the nanoparticles' surface was carried out in terms of emulsion polymerization method. The grafting polymers proved to be chemically attached to the nanoparticles via the double bonds introduced during the coupling agent pretreatment. The factors affecting the graft parameters, such as monomer concentration, initiator consumption, reaction time, etc., were investigated. It was shown that higher concentrations of monomer and initiator are favorable for the graft polymerization. When St/GMA was employed as the grafting monomer, the nanoparticles were found to play the role of polymerization loci. The grafted nanoparticles exhibit greatly improved dispersibility in cured epoxy. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 102: 992–999, 2006