Abstract
Titanate nanotubes (Ti-NT) were prepared by hydrothermal synthesis from four different TiO2 powders: anatase micropowder (mA), rutile micropowder (mR), anatase nanopowder (nA), and rutile nanopowder (nR). As we use the nanotubes as filler in molten polymers, we investigated their structural changes at elevated temperatures (up to 800 °C) by a number of methods: transmission electron microscopy (TEM), selected-area electron diffraction (SAED), powder X-ray diffraction (PXRD), thermogravimetric analysis (TGA) and Raman scattering (RS).