Sutopo, Komar Roni, Beni Tri Sasongko, Virda Hersy Lutviana Saputri, Rio Valeriano Sbroong
In an effort to enhance sustainability and reduce negative environmental impacts, the development of renewable materials has become a primary focus in various industries. One solution is to reduce the use of synthetic fibers, which are difficult to degrade and expensive, by replacing them with natural fibers. This study focuses on analyzing the variation in composition of coconut coir fiber and cantula fiber in the production of polyester composites. The research method applied is experimental, with a matrix-to-fiber ratio of 70% to 30%. The fiber composition variations between coconut coir and cantula fibers are 10%: 20%, 15%: 15%, and 20%: 10%, which will be evaluated using impact tests, micrograph tests, and SEM tests. The goal of this research is to determine the best fiber composition for impact strength. The results indicate that the highest impact strength was achieved with a fiber composition of 20% coconut coir fiber: 10% cantula fiber, reaching 24.907 MPa. Micrograph and SEM images of the impact test fractures revealed several defects that corresponded with the impact strength, where higher impact strength resulted in fewer defects on the fracture surface. © 2025 Author(s).
Mechanical and Automotive Department, Universitas Negeri Yogyakarta, Yogyakarta, Indonesia
