Low-temperature synthesized aluminosilicate glasses. Part II Rheological transformations during low-temperature cure and high-temperature properties of a model compound

摘要: The reaction below 100 °C of a dehydroxylated clay (metakaolinite) suspended in an alkaline sodium silicate solution leads to amorphous aluminosilicate, called low-temperature inorganic polymer glass (LTIPG or IPG). Some rheological transformations during the isothermal hardening process are followed with dynamic mechanical analysis (DMA) and compared differential scanning calorimetry (DSC) modulated (MDSC). It can be concluded that change storage modulus formation network characterized quantitatively evolution heat capacity (MDSC), rate is not decreased by vitrification process. During first heating after polymerization up 1000°C, material shrinks due evaporation residual water from mixture as illustrated thermogravimetric (TGA) thermomechanical (TMA). synthesized thermomechanically stable temperature at least 650°C. In zone, transition detected TMA DMA.