Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Schematic of the in situ sol–gel reactions possibly occurring in the ‘chronological’ two-step procedure for the preparation of epoxy–SiO2 nanocomposites. Diglycidyl ether of bisphenol A (DGEBA) is used as the epoxy monomer, 3-aminopropyltriethoxysilane (APTES) as the coupling agent, and tetraethylorthosilicate (TEOS) as the silica (SiO2) precursor. The curing step is not shown in this schematic.
