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Synthesis and characterization of hybrid films from hyperbranched polyester using a sol–gel process
Author(s) -
Houel Amélie,
Galy Jocelyne,
Charlot Aurélia,
Gérard JeanFrançois
Publication year - 2014
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.39830
Subject(s) - materials science , polyester , polymer , chemical engineering , molar mass , calcination , small angle x ray scattering , sol gel , dynamic mechanical analysis , thermal stability , hybrid material , phase (matter) , characterization (materials science) , solubility , condensation polymer , polymer chemistry , composite material , organic chemistry , nanotechnology , chemistry , physics , optics , scattering , engineering , catalysis
Hybrid organic/inorganic materials were prepared by an in situ sol–gel process using tetraethoxysilane (TEOS) in the presence of hyperbranched polyester. The influences of hyperbranched polyester molar mass as well as the amount of TEOS were examined. The condensation degree was characterized by solid state 29 Si NMR. The combination of solubility tests, calcination tests, SAXS and dynamic mechanical analysis allowed us to investigate the hybrid material nanostructure. The results show high compatibility between the inorganic silica phase and the organic polymer phase, due to the spherical shape of the hyperbranched polymer and its numerous hydroxyl groups. As a consequence, a continuous inorganic phase was formed even with a low silica precursor content without any macroscopic phase separation. These hybrid materials have a high T g and high storage modulus even at an elevated temperature combined with improved thermal stability. © 2013 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2014 , 131 , 39830.