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Preparation and Characterization of Hybrid Nanocomposite Coatings by Cationic UV‐Curing and the Sol‐Gel Process of a Vinyl Ether Based System
Author(s) -
Sangermano Marco,
Amerio Ezio,
Epicoco Paolo,
Priola Aldo,
Rizza Giancarlo,
Malucelli Giulio
Publication year - 2007
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.200600507
Subject(s) - materials science , nanocomposite , vinyl ether , cationic polymerization , photopolymer , sol gel , curing (chemistry) , chemical engineering , uv curing , glass transition , dynamic mechanical analysis , hybrid material , polymer , polymer chemistry , elastomer , ether , composite material , organic chemistry , nanotechnology , polymerization , copolymer , chemistry , engineering
Organic/inorganic hybrid nanocomposite coatings were prepared through a dual‐cure process involving the cationic photopolymerization of a vinyl ether based system and the condensation of an alkoxysilane inorganic precursor. All formulations produced transparent cured films characterized by high gel contents. An increase in glass transition temperature and an increase in storage modulus above T g in the rubbery plateau were observed with increasing TEOS content in the photocurable formulation. TEM micrographs showed that the organic and inorganic phases were strictly interconnected with no macroscopic phase separation; the sizes of the silica domains in the polymeric matrix were 3–5 nm.