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Thermal, Mechanical, and Morphological Properties of DPU/Titanate Nanotubes Nanocomposites
Author(s) -
Lima Gabrielle R.,
Monteiro Wesley F.,
Hoffmann Mauricio S.,
dos Santos Claudia A. B.,
Toledo Bruno O.,
Einloft Sandra,
Dullius Jeane,
Campani Adriano,
Ligabue Rosane A.
Publication year - 2019
Publication title -
macromolecular symposia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.257
H-Index - 76
eISSN - 1521-3900
pISSN - 1022-1360
DOI - 10.1002/masy.201800009
Subject(s) - materials science , nanocomposite , polyurethane , composite material , thermal stability , polymer , glass transition , dynamic mechanical analysis , thermogravimetric analysis , dispersion (optics) , titanate , modulus , chemical engineering , ceramic , optics , engineering , physics
Nanocomposites of Titanates Nanotubes (TNTs) and waterborne polyurethane were prepared by physical mixture using ultra turrax disperser. TNTs were synthesized by hydrothermal method and added in different contents: 1, 3, and 5% w/w in relation to polymer weight. Films were prepared and characterized by DSC, TGA, DMA and SEM. The increase of fillers content reduced the thermal stability of DPU nanocomposites compared to pure DPU and did not modify the glass transition temperature. To mechanical properties, the addition of 3% and 5% of TNT increased the Young's modulus when compared with pure DPU, but nanocomposite with 1% of TNT presented a decrease in Young's modulus. The stress × strain curves of DPU/TNT 5% presented characteristic behavior of rigid material, with low deformation, unlike other nanocomposites and pure DPU. SEM and TGA analysis proves that the preparation method used promoted the incorporation and good filler dispersion in the polymer matrix.