Sifat Mekanik Komposit Epoksi dan Poliester Tak Jenuh Sebagai Kandidat Material Pelapis Lambung Kapal Ikan

Abstract

Bitung is one of the fish-producing cities that has thousands of fishing vessel.
Most of the wooden vessel owners in Bitung City coat the hull using Fiberglass
Reinforced Polyester (FRP) as a composite material and others use Sand Particle
Reinforced Epoxy (PRE). The research aims to determine the mechanical quality of
FRP and PRE as a composite materials based on tensile and hardness tests before
used to coating wooden vessel hulls. The research method is experimental in which
for FRP material, the unsaturated polyester matrix will be coated with 0, 1, 2, 3, and
4 layers of fiberglass. The PRE material, epoxy matrix was mixed with sand at 0, 5, 10, 15, and 20%wt sand content. The result is highest tensile stress and elongation
break values obtained by FRP material at 3 layers (194.2 MPa and 5.46%) while for
PRE material with the addition of sand particles as much as 20%wt (16 MPa) and
10%wt (1.50%). The highest hardness test results in FRP material at 4 layers (81.9
HD) and PRE material at 20%wt (85.3 HD). Conclusion is the FRP composite
materials with a minimum number of layers of two are recommended to be used as a
shipbuilding composite material because comply with BKI standards (>85 MPa).