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Thermal and mechanical properties of polyurethane rigid foam/modified nanosilica composite
Author(s) -
Nikje Mir Mohammad Alavi,
Tehrani Zahra Mazaheri
Publication year - 2010
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21559
Subject(s) - materials science , composite material , polyurethane , thermogravimetric analysis , dynamic mechanical analysis , glass transition , fumed silica , fourier transform infrared spectroscopy , composite number , surface modification , thermomechanical analysis , ultimate tensile strength , scanning electron microscope , thermal analysis , polymer , thermal , thermal expansion , chemical engineering , physics , meteorology , engineering
Surface modification of fumed nanosilica was performed by using n ‐(2‐aminoethyl)‐3‐aminopropyltrimethoxysilane as a coupling agent. Then, modified nanosilica was utilized in the preparation of polyurethane rigid foam. The characterization and the study of properties were done by some techniques, such as Fourier transform infrared spectroscopy, thermogravimetric analysis, scanning electron microscopy, dynamic mechanical analysis, and thermomechanical analysis. Also, tensile test was examined to evaluate the static mechanical properties. With the increasing of modified nanosilica, thermal and static mechanical properties were enhanced, but dynamic mechanical behavior was different from static mechanical behavior because of the different properties of interfacial domain and bulk matrix. The presence of functional groups on the nanosilica surface affected stoichiometry and reduced hard phase formation in bulk polymer. The decrease in glass transition temperature ( T g ) confirmed this statement. POLYM. ENG. SCI., 2010. © 2009 Society of Plastics Engineers