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Synthesis of tercopolymer BA–MMA–VTES and surface modification of nano‐size Si 3 N 4 with this macromolecular coupling agent
Author(s) -
Xia Ru,
Li Minghua,
Zhang Yuchuan,
Zhu Qingren,
Qian Jiasheng
Publication year - 2007
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.27175
Subject(s) - materials science , macromolecule , thermal stability , polymer chemistry , fourier transform infrared spectroscopy , surface modification , chemical engineering , benzoyl peroxide , covalent bond , polymerization , radical polymerization , nano , acrylate , methyl methacrylate , butyl acrylate , emulsion polymerization , copolymer , polymer , chemistry , organic chemistry , composite material , biochemistry , engineering
A new macromolecular coupling agent butyl acrylate (BA)‐methyl methacrylate (MMA)‐vinyl triethoxy silane (VTES) tercopolymer was synthesized using solution polymerization initiated by free radical initiator benzoyl peroxide (BPO) and dicumyl peroxide (DCP). Dodecylthiol is choosed as the chain transfer to control the molecule weight of this tercopolymer. The terpolymer's molecular structure was confirmed by FTIR and NMR, and its average molecular weight was determined by GPC. In this work, the tercopolymer BA–MMA–VTES is used for surface modification of silicon nitride (Si 3 N 4 ) nanopowder. The structure surface properties and thermal stability of modified nano‐Si 3 N 4 were systematically investigated by FTIR, TGA, TEM, and size distribution analyzer. The results show that the macromolecular coupling agent bonds covalently on the surface of nano‐sized Si 3 N 4 particles and an organic coating layer is formed. The optimum loading of this macromolecular coupling agent BA–MMA–VTES tercopolymer is 5% (wt %) of nano‐sized Si 3 N 4 . TEM also reveals that modified nano‐Si 3 N 4 possesses good dispersibility. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci, 2008