Thermal, Mechanical, and Morphological Properties of DPU/Titanate Nanotubes Nanocomposites

• Published in: Macromolecular symposia. Vol. 383; no. 1
• Main Authors: 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.
• Format: Journal Article
• Language: English
• Published: Weinheim Wiley Subscription Services, Inc 01.02.2019
• Subjects: blending; Deformation; Dispersion; Fillers; Glass transition temperature; Mechanical properties; Modulus of elasticity; Nanocomposites; Nanotubes; Polymer films; Polyurethane; Polyurethane resins; Thermal stability; titanate nanotubes; Titanates; waterborne polyurethane; Weight
• ISSN: 1022-1360; 1521-3900
• DOI: 10.1002/masy.201800009

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.