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The effect of silica nanoparticles on the thermomechanical properties of polystyrene
Author(s) -
Kontou E.,
Anthoulis G.
Publication year - 2007
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.26409
Subject(s) - materials science , differential scanning calorimetry , polystyrene , composite material , nanocomposite , thermomechanical analysis , viscoelasticity , scanning electron microscope , ultimate tensile strength , dynamic mechanical analysis , nanoparticle , polymer , thermal expansion , nanotechnology , thermodynamics , physics
A series of polystyrene (PS)/SiO 2 nanocomposites were prepared. Silica nanoparticles with an average diameter of 16 nm were used, and treated with dimethyldichlorosilane, while their weight fraction varied from 4 up to 10%. The viscoelastic‐thermomechanical properties of the nanocomposites and their interrelation with the material's structure were studied with various experimental techniques. Scanning electron microscopy, differential scanning calorimetry, dynamic mechanical analysis, and tensile testing at three different temperatures were applied. The stress–strain curves at 85°C, where the material's viscoplastic response is manifested, were simulated through a plasticity model, developed in previous works. The 4% weight fraction was found to be the optimum one for the enhancement of the thermomechanical properties. © 2007 Wiley Periodicals, Inc. J Appl Polym Sci 2007