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Synthesis and characterization of a hybrid material based on a trimethoxysilane functionalized benzoxazine
Author(s) -
Spontón M.,
Estenoz D.,
Lligadas G.,
Ronda J. C.,
Galià M.,
Cádiz V.
Publication year - 2012
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.36766
Subject(s) - thermogravimetric analysis , differential scanning calorimetry , materials science , fourier transform infrared spectroscopy , thermal stability , limiting oxygen index , dynamic mechanical analysis , curing (chemistry) , hybrid material , polymer chemistry , monomer , polymerization , chemical engineering , polymer , composite material , pyrolysis , char , physics , engineering , thermodynamics , nanotechnology
A polybenzoxazine/polysiloxane hybrid has been prepared by sol–gel process and ring‐opening polymerization. For this purpose, first a functionalized benzoxazine was synthesized from bisphenol A, paraformaldehyde and 3‐(trimethoxysilyl) propylamine, with initial molar ratio 1 : 4 : 2, and 95% yield. The structure of the monomer was characterized by Fourier transform infrared (FTIR) spectroscopy and nuclear magnetic resonance. The sol–gel process and curing behavior have been studied by FTIR spectroscopy and differential scanning calorimetry. The dynamic mechanical thermal analysis of the hybrid material (Bz‐PSi) showed higher T g and storage modulus respect to the conventional polybenzoxazine (Bz‐BA). Also, the thermogravimetric analysis revealed a better thermal stability. The high limiting oxygen index (LOI) values (about LOI = 32) confirmed similar effective flame retardance properties of the hybrid material respect to conventional benzoxazine. © 2012 Wiley Periodicals, Inc. J Appl Polym Sci, 2012