Exploration of Titanium-Based Fine-Particle Additive Influence on Cohesive and Adhesive Strength Enhancement in Epoxy-Polymer Composites

Oksana Baranovska; Gennadii Bagliuk; Andriy  Buketov; Oleksandr Sapronov; Dmytro Baranovsky

doi:10.15330/pcss.25.3.453-460

Authors

Oksana Baranovska Frantsevich Institute for Problems of Materials Science NASU, Kyiv, Ukraine
Gennadii Bagliuk Frantsevich Institute for Problems of Material Science NAS of Ukraine, Kyiv, Ukraine
Andriy Buketov Kherson State Maritime Academy, Kherson, Ukraine
Oleksandr Sapronov Kherson State Maritime Academy, Kherson, Ukraine
Dmytro Baranovsky Frantsevich Institute for Problems of Material Science NAS of Ukraine, Kyiv, Ukraine

DOI:

https://doi.org/10.15330/pcss.25.3.453-460

Keywords:

composite, polymer, powder, filler, structure, strength, adhesion, epoxy resin

Abstract

The study examines how the inclusion of a dispersed powder filler affects the physico-mechanical properties of an ultrasound-modified epoxy matrix. Varying the filler content from 5% to 60% by weight in the composite revealed an optimal concentration for enhanced mechanical properties. Introducing the filler at 5% led to maximum impact strength (W = 18.47 kJ/m²) and minimized destructive stresses during bending (σ_B= 51.75 MPa). At 10% filler concentration, destructive bending stresses increased significantly from σ_B = 48.0 MPa to σ_B= 74.85 MPa, with impact strength improving from W = 7.4 kJ/m² to W = 17.42…18.47 kJ/m². Further increasing filler content to 20–60% resulted in a slight decrease in destructive stresses while still surpassing for the filler-free epoxy matrix strength. Optimal modifier content improved adhesive characteristics, achieving a peak adhesive strength (σ_a = 33.4 MPa) at 20% filler, albeit with residual stresses at 0.34 MPa. Introducing the modifier at 10% increased adhesive strength to σ_a = 28.6 MPa, marking a 1.15-fold improvement over the filler-free epoxy matrix, while reducing residual stresses from σres = 1.4 MPa to σ_res = 1.0 MPa. Higher filler content (40-60%) led to decreased adhesive strength and increased residual stresses (σ_r_es = 0.62…0.69 MPa).

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