Electronic Theses and Dissertation

Penelitian ini bertujuan untuk menganalisis pengaruh metode manufaktur handlay-up (hlu), vacuum infusion (vi), dan compression molding (cm) terhadapsifat fisik dan mekanik komposit berbahan dasar kain denim dengan matriks resinepoksi melalui pengujian penyerapan air, tarik, dan lentur. hasil penelitianmenunjukkan bahwa metode manufaktur berpengaruh signifikan terhadapkarakteristik komposit yang dihasilkan. metode compression molding memiliki penyerapan air terendah sebesar 4,16% serta menunjukkan performa mekaniktertinggi dengan tegangan tarik maksimum 50,29 mpa, modulus elastisitas tarik2293,3 mpa, dan modulus lentur sekitar 540 mpa, yang mengindikasikan struktur komposit yang lebih rapat, homogen, dan memiliki kekakuan tinggi. metodevacuum infusion menghasilkan densitas tertinggi sebesar 1,33 g/cm³ sertaregangan tarik dan regangan lentur tertinggi masing-masing sebesar 11,32%dan13,78%, yang menunjukkan kemampuan deformasi dan keuletan material yanglebih baik akibat distribusi resin yang lebih merata. sementara itu, metode handlay-up menunjukkan nilai penyerapan air dan sifat mekanik yang relatif lebihrendah dibandingkan dua metode lainnya. secara keseluruhan, compressionmolding merupakan metode paling optimal untuk menghasilkan komposit dengankekuatan dan kekakuan tinggi, sedangkan vacuum infusion lebih unggul dalammenghasilkan komposit dengan sifat keuletan yang baik. kata kunci: limbah tekstil kain denim, komposit, metode manufaktur, handlay-up, vacuum infusion, compression molding

This study aims to analyze the effect of HandLay-Up (HLU), Vacuum Infusion (VI), and Compression Molding (CM) manufacturing methods on the physical and mechanical properties of denim-based composites with epoxy resin matrix through water absorption, tensile, and flexural tests. The results of the study indicate that the manufacturing method has a significant effect on the characteristics of the resulting composite. The Compression Molding method had the lowest water absorption of 4.16% and showed the highest mechanical performance with a maximum tensile stress of 50.29 MPa, tensile elastic modulus of 2293.3 MPa, and flexural modulus of around 540 MPa, indicating a denser, more homogeneous, and highly rigid composite structure. The Vacuum Infusion method produces the highest density of 1.33 g/cm³ and the highest tensile and flexural strains of 11.32% and 13.78%, respectively, which indicates better deformation and toughness of the material due to a more even distribution of resin. Meanwhile, the Hand Lay-Up method showed relatively lower water absorption and mechanical properties compared to the other two methods. Overall, Compression Molding is the most optimal method for producing composites with high strength and stiffness, while Vacuum Infusion is superior in producing composites with good toughness properties. Keywords: Denim Fabric Textile Waste, Composites, Manufacturing Methods, Hand Lay-Up, Vacuum Infusion, Compression Molding