期刊
MACROMOLECULAR SYMPOSIA
卷 229, 期 -, 页码 32-46出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/masy.200551105
关键词
emulsion polymerization; laponite; nanocomposite colloids; organic modification; silicas
Polymer latex particles were synthesized in the presence of inorganic particles, which had been organically-modified to promote favorable interactions with growing macromolecules. The organic modification was performed using three different routes: (1) surface covalent grafting of vinyl trialkoxysilanes, (2) surface adsorption of polyethylene glycol-based macromonomers, and (3) bulk modification through ion exchange with cationic monomers or cationic initiators. Two types of mineral particles were studied: commercial and self-prepared silica particles (with diameters from 80 nm to 1 mu m), and commercial laponite clay particles with a cation exchange capacity Of 0.75 meq center dot g(-1). Emulsion polymerization was performed in the presence of styrene or butyl acrylate monomers. The morphologies of the nanocomposite particles were observed by (cryogenic) transmission electron microscopy and correlated to the organic modification procedure.
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