EPOXY-SILICA NANOCOMPOSITE: CREEP RESISTANCE AND TOUGHENING MECHANISMS

  • Ngoc Minh Ho Institute of Chemistry and Materials, Academy of Military Science and Technology
  • Quoc Bang Ha Institute of Chemistry and Materials, Academy of Military Science and Technology
  • Dinh Thao Vu Faculty of Physics and Chemical Engineering, Le Quy Don Technical University, Hanoi, Vietnam
Keywords: Epoxy, nanosilica, KR-12, creep and recover, toughness mechanism

Abstract

In this article, the effect of modified nanosilica (m-nanosilica) on the mechanical and creep performance of epoxy resin were investigated. At the same time, the toughnening mechanisms of epoxy resin with m-nanosilica were also considered. The results show that the crack pinning and crack deflection mechanism contributes only a small part to nanocomposite, this due to the size of the nanosilica particles is such smaller than crack-opening displacement. The FE-SEM surface fracture shows evidence of the debonding of the nanoparticles from the polymer matrix and the expansion of the holes around the nanoparticles as well as the existence of the plastic deformation zone. Plastic deformation and plastic void growth are the main toughening mechanism in nanocomposite material.

điểm /   đánh giá
Published
2023-11-24
Issue
Vol. 1 No. 02 (2023)
Section
SCIENTIFIC RESEARCH