Influences of POSS-E-GO Content on Mechanical Properties of Bio-based Epoxy/DOPO-POSS Nanocomposites

Abstract

The bio-based epoxy nanocomposite (GAER/DOPO-POSS) was prepared from gallic epoxy resin (GAER) and polyhedral oligomeric silsesquioxane (which containing 9,10-dihydrogen-9-oxo-10-phosphorus-phenanthrene-10-oxide groups, called DOPO-POSS). The polyhedral oligomeric silsesquioxane containing epoxy groups (E-POSS) was grafted onto aminated graphene oxide (E-GO), then the novel POSS-E-GO was obtained. The POSS-E-GO was used as modifier for GAER/DOPO-POSS nanocomposite. The influences of POSS-E-GO content on mechanical properties, dynamic mechanical properties and thermal stability of GAER/DOPO-POSS nanocomposites were determined. The experimental results show that POSS-E-GO can significantly improve the toughness of the GAER/DOPO-POSS nanocomposite. When 0.5wt% POSS-E-GO was added in GAER/DOPO-POSS nanocomposite, the impact strength of the nanocomposite was 4.74 kJ/m² higher than that in the absence of POSS-E-GO, meantime the initial thermal degradation temperature was 277 °C.

Keywords

epoxy resin / impact resistance / nanocomposites

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