Mechanical and dielectric properties of epoxy–clay nanocomposites

摘要: Epoxy–clay nanocomposites were prepared using two types of surface-treated montmorillonite (Closite 30B and Nanomer I28E). Wide angle X-ray scattering showed that all the had an intercalated structure. Improvements in tensile fracture properties found. The pure epoxy polymer was very brittle with a energy, Gc, 131 J m−2. addition nanoclays significantly increased value up to 240 m−2 for 5 wt% C30B. toughening mechanisms acting identified scanning electron microscopy as crack deflection plastic deformation matrix around clay platelets following debonding. From electrical testing, permittivity loss decreased, their breakdown strength desired insulation applications. found be 11.7 kV mm−1, while 2 C30B nanocomposite, it 14.7 mm−1. It concluded restriction chain mobility inhibited polarisation thus decreased angle. damage zone analysed microscopy. higher resistance-to-surface degradation by partial discharges creation tortuous path, which delayed propagation tree, main factors improved strengths nanocomposites.