EFFECT OF STACKING SEQUENCE ON THE TENSILE AND IMPACT PROPERTIES OF POLYPROPYLENE COMPOSITE REINFORCED WITH HYBRID SANSEVIERIA TRIFASCIATA/COCONUT HUSK FIBERS

• Main Author: Hasfari Firmansyah, L.
• Format: Theses
• Language: Indonesia
• Subjects: Teknik (Rekayasa, enjinering dan kegiatan berkaitan)
• Online Access: https://digilib.itb.ac.id/gdl/view/84953
• Institution: Institut Teknologi Bandung

Natural fiber-reinforced polymer composites typically exhibit high tensile strength with low elongation, or vice versa. As a result, these composites often lack balance in their mechanical properties. This study aims to investigate the effect of laminate stacking sequences on tensile and impact properties composite hybrid. composites polypropylene reinforced with hybrid fibers of Sansevieria trifasciata (L) and coconut husk (K) were fabricated using compression moulding. The stacking sequence variations [K,L]s and [L,K]s were evaluated for tensile properties according to ASTM D3039 and impact properties using the Charpy method with edgewise and flatwise orientations according to ASTM D5924. The stacking sequence symmetric Coconut husk/Sansevieria trifasciata fiber ([K,L]s) enhances tensile strength, stiffness, elongation, and impact strength in the flatwise orientation to 42 MPa, 3.68 GPa, 9.10%, and 62 kJ/m², respectively, compared to the stacking sequence symmetric Sansevieria trifasciata/Coconut husk fiber ([L,K]s), which achieves 34 MPa, 3.37 GPa, 6.45%, and 56 kJ/m². However, in the edgewise orientation, the stacking sequence symmetric Sansevieria trifasciata/Coconut husk ([L,K]s) shows higher impact strength at 97 kJ/m² compared to the stacking sequence symmetric Coconut husk/Sansevieria trifasciata ([K,L]s) at 95 kJ/m². The positive hybrid effect is more dominant in the [K,L]s stacking sequence.