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To improve the mechanical property of epoxy resin (EP) had received intensive attentions in engineering industries at present. For this reason, three kinds of epoxy resin nanocomposites were prepared by incorporating different POSS nanoparticles. This study showed the toughening effect of three kind of nanocomposites and analyzed the different toughening mechanism. The thermomechanical properties and impact strength of the samples were investigated by means of dynamic thermomechanical analysis (DMA) and XJJ-50 type tester. The thermal stability was examined by thermal gravimetric analysis (TGA) and scanning electron microscopy (SEM) was used to characterize the morphology of fracture surfaces for composites. When introduction of Octavinyl-POSS (OV-POSS), DodecaPhenylPOSS (DP-POSS) and Methacryl-POSS (M-POSS) was 1.0 phr, the values of impact strength reach 22.60 kJ/m2, 24.90 kJ/m2, 29.61 kJ/m2 and the values of storage modulus get to 2.88 GPa, 2.25 GPa, 2.14 GPa respectively. It can be observed that M-POSS has the most obvious effect when introduced into the same amount of POSS. Meanwhile, adding nanoparticles has no obvious impact on the excellent thermal stability of EP.

Epoxy Resin/POSS Nanocomposites with Toughness and Thermal Stability