On the compressive elasticity of epoxy resins filled with hollow glass microspheres

Abstract

SYNOPSISThe mechanical properties of a hollow glass microsphere-filled epoxy resin composite system were investigated in air as a function of the weight content of particles ranging from 0 to 15.38% (wt/wt). The analysis based on necessarily modified classical models together with structural observations enabled explanation of the composition dependencies of elastic moduli of the blends studied. It was found that, together with a presumption of no interfacial adhesion between the filler and matrix, an interlayer of immobilized matrix with changed mechanical properties compared to the formal matrix seems to strongly affect the mechanical behavior of the composite. and the debonded microsphere.

Syntactic Foams

“…Thus, the compressive yield strength and initial tangent modulus of elasticity were linearly dependent on the bulk density and the volume fraction of microballoons as depicted in Figure 13.12 [63]. In another study, the compressive strength decreased from 70 MPa to 50 MPa as the weight fraction of the microballoons increased from 15% to 35% [84]. Zihlif However, an upward trend was observed for the syntactic foams with K46 microspheres, which is attributed to a relatively minor decrease in the compressive yield strength compared to the decrease in density.…”

Methods to increase the toughness of structural adhesives with micro particles: an overview with focus on cork particles

“…Two different methods to improve the toughness of adhesives have emerged, both with their own advantages and disadvantages: Polymer without phase separation, known as chemical modification of molecular structure ; Polymer with phase separation, with a supramolecular organization ; There are two main procedures to generate second‐phase dispersion in a modified‐thermosetting polymer: Phase separation during polymerization of an initial homogeneous solution (reaction‐induced phase separation) ; Dispersion of a second phase in the starting monomers (reinforcement inclusion) . …”

“…Phase separation during polymerization of an initial homogeneous solution (reaction‐induced phase separation) ;…”

Synergistic Toughening in Ternary Silica/Hollow Glass Spheres/Epoxy Nanocomposites

“…On the other hand, HGMS decrease the elastic modulus of the resin. This is similar to what reported by previous researchers [43,44] and is attributed to lower elastic modulus of the hollow structure (for thin-walled spheres) [43] as well as the low filler-matrix interfacial adhesion and debonding (for thick-walled spheres) [44][45][46] .…”