Effect of composing particles of two sizes on mechanical properties of spherical silica-particulate-reinforced epoxy composites

Ethylene-octene copolymer (POE) toughened polyamide 6/polypropylene nanocomposites: Effect of POE maleation

“…However, the Izod impact test data cannot be used for design purposes, although they can be used for comparing the toughness between different polymer systems. With the objective to characterize toughness of polymer nanocomposites with greater accuracy, many researchers have adopted fracture mechanics approach in their studies [2,16,17]. Furthermore, the toughness evaluation of PA6/PP/ elastomer nanocomposites, particularly fracture toughness, has not been systematically investigated.…”

Synergistic Effects of Mixed Silica Micro-nanoparticles on Compressive Dynamic Stiffness and Damping of Epoxy Adhesive

“…It is worth noting that silica nanoparticle:microparticle compositions of 25:75% or 50:50% increase epoxy stiffness by 45% compared to that of neat epoxy. In previous studies, Kwon et al [14,15], Dittanet and Pearson [16], and Shariati et al [17], did not obtain a considerable cooperative stiffening effect of well-dispersed twosize silica particles. Kwon et al and Shariati et al mixed two-size silica particles, which have smaller size ratios (1.56:0.24 µm and 17:65 nm in diameter, respectively) than that used in the present work (34 µm:17 nm).…”

“…Additionally, such bimodal silica particles induce more complex matrix-filler and inter-particle interactions, which generate concurring effects on epoxy dynamic properties [14][15][16]. Nevertheless, such deagglomeration effectivity over a wide range of silica weight fractions and its subsequent collaborative effects on epoxy dynamic stiffness and damping, especially at intermediate-strain-rate loading, have been given little attention.…”

“…Kwon et al [14,15] and Dittanet and Pearson [16] found an appropriate composition ratio of two-size silica particles that cooperatively toughens epoxy and ascribed this to better particle dispersion. Shariati et al [17] found good dispersion at 1.5-6 wt% for two-size silica nanoparticles of 17 and 65 nm diameters but did not find any considerable coactive effects on stiffness and fracture energy absorption.…”

Effects of mixed micro and nano silica particles on the dynamic compressive performances of epoxy adhesive

“…Kwon et al [10] and Adachi et al [11] using relatively small size ratio of silica fillers (i.e., 1.56 and 0.24 μm in diameters), have reported that the composition ratio slightly affects both bending and static tensile stiffness. They have also found that the epoxy stiffness strongly depends on the weight fraction of the silica particles.…”