𝔖 Bobbio Scriptorium
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Synthesis, structure, and morphology of polymer–silica hybrid nanocomposites based on hydroxyethyl methacrylate

✍ Scribed by P. Hajji; L. David; J. F. Gerard; J. P. Pascault; G. Vigier

Publisher
John Wiley and Sons
Year
1999
Tongue
English
Weight
508 KB
Volume
37
Category
Article
ISSN
0887-6266

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✦ Synopsis

Two types of polymer-silica nanocomposites have been prepared by undergoing free radical polymerization of 2-hydroxyethyl methacrylate (HEMA) either in the presence of HEMA-functionalized SiO 2 nanoparticles (Type 1) or during the simultaneous in situ growing of the silica phase through the acid-catalyzed sol-gel polymerization of tetraethoxysilane (TEOS) (Type 2). Relationships between synthesis conditions, chemical structure, and resulting morphology have been studied. Type 1 systems exhibit a classical particle-matrix morphology, but where particles tend to form aggregates. Type 2 systems possess a finer morphology characterized by a very open massfractal silicate structure, which is believed to be bicontinuous with the organic phase at a molecular level.

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