Optimization and Mechanical Performance of Resin–Talc Sandwich Core Composites for Ship Construction
1Department of Naval Architecture, Faculty of Engineering, University of Jember, Jember, Indonesia
2Department of Capture Fisheries, Universitas Syiah Kuala, Banda Aceh, Indonesia
3Graduate School of Department of Naval Architecture, Faculty of Engineering, University of Jember, Jember, Indonesia
*Author to whom correspondence should be addressed:
E-mail: pratamayarianto@unej.ac.id (PYA)
E-mail: pratamayarianto@unej.ac.id (PYA)
Received: May 28, 2025 | Revised: December 23, 2025 | Accepted: March 10, 2026 | Published: June 2026
Abstract
Driven by the maritime industry’s need to reduce fuel consumption and emissions, developing lightweight yet strong structural materials is essential. This study investigates resin–talc sandwich core composites for shipbuilding materials. Composites of unsaturated polyester resin (UPR) and talc were fabricated via casting, with resin-to-talc ratios of 50:50 to 90:10 and catalyst concentrations from 0.1% to 1.3%. Mechanical properties were evaluated per Lloyd’s Register standards. The 50:50 ratio with 0.1% catalyst achieved the highest tensile strength (22.11 MPa), while the 80:20 ratio offered optimal overall performance. Lower catalyst levels with 20% talc improved strength, ductility, and reduced voids.
Keywords
catalyst; density; sandwich core; talc; tensile strength; unsaturated polyester resin (UPR)
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