JOURNAL OF VINYL & ADDITIVE TECHNOLOGY, cilt.1, sa.1, ss.1-15, 2025 (Scopus)
Fused filament fabrication (FFF) technology has rapidly progressed in software and equipment, driven by increasing demand
across industries and households. However, the development of compatible and high-performance
materials has lagged, limiting
the mechanical integrity and design flexibility of printed components. To address this issue, this study investigates the
interfacial bonding behavior of multi-material
structures composed of acrylonitrile butadiene styrene (ABS) and polyamide
(PA), two polymers that are chemically incompatible. To enhance interfacial adhesion, three commonly used thermoplastic
filaments were employed as intermediate compatibilizing layers. Mechanical characterization was performed through tensile
and interlaminar shear strength tests to evaluate bonding performance. All compatibilizing layers improved adhesion
between ABS and PA, yielding up to 32% higher tensile strength and 43% higher interlaminar shear strength compared to
direct stacking. Fractographic observations confirmed these results by revealing distinct failure patterns and improved interfacial
continuity. Overall, the findings demonstrate a practical method for achieving strong adhesion between incompatible
polymers without surface treatments or adhesives, offering guidance for the design of hybrid structures and expanding the
potential of the technology.