Influence of liquid-like polyhedral oligomeric silsesquioxanes derivatives structures on thermal resistance property of their epoxy nanocomposites

Four kinds of liquid-like polyhedral oligomeric silsesquioxanes derivatives (liquid-Ds) were fabricated and characterized by FTIR, XPS, TGA, and Rheometer. The liquid-Ds/epoxy nanocomposites were prepared and their thermal resistance properties were tested by TGA. As a result, the thermal resistances properties were improved sharply and influenced by particle sizes, flow abilities, and bonding types of liquid-Ds. The glass transition temperature improved via adding liquid-Ds. The increase of crosslinking density was thought as an important factor to these improvements, which was studied by FTIR spectra and gel content of curved nanocomposites. POLYM. COMPOS., 39:1620–1629, 2018.