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Enhanced Thermal and Mechanical Properties in Polyurethane/Au Nanocomposites
Author(s) -
Hsu Shanhui,
Chou ChihWei,
Tseng ShengMao
Publication year - 2004
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.200400171
Subject(s) - materials science , nanocomposite , differential scanning calorimetry , polyurethane , thermogravimetric analysis , scanning electron microscope , dynamic mechanical analysis , fourier transform infrared spectroscopy , nanoparticle , composite number , composite material , microstructure , crystallization , chemical engineering , polymer , nanotechnology , physics , engineering , thermodynamics
Summary: We have prepared waterborne polyurethane (WBPU) thin films containing gold nanoparticles by casting WBPU/Au solutions. The effect of the Au nanoparticle contents on the microstructure and properties of the composite films was investigated by thermogravimetric analysis (TGA), differential scanning calorimetry (DSC), field emission scanning electron microscopy (FESEM), transmittance electron microscopy (TEM), FTIR spectroscopy (FTIR) and dynamic mechanical analysis (DMA). The Au nanoparticles initially in the WBPU solution were well dispersed in the WBPU films cast and dried at 60 °C. The thermostability and mechanical properties of the polymer increased with Au contents up to 4.35 × 10 −2 wt.‐%, which was believed to be a result of induced crystallization in the presence of Au nanoparticles. The Au/WBPU nanocomposite containing with 6.5 × 10 −2 wt.‐% of Au resulted in the aggregation of Au particles, which leads to a worsening of the thermal and mechanical properties.TEM micrograph of nanocomposites filled with 4.35 × 10 −2 wt.‐% of Au nanoparticles.