| Jurnal Angkasa Tahun 2013 Oleh Heribertus Sukarja |
PENGARUH PENAMBAHAN CLAY TERHADAP SIFAT MEKANIK KOMPOIT HIBRID EPOKSI /SERAT GELAS |
| ABSTRAK |
| The aim of this study is to evaluate the effect of addition of clay on the impact strength and fracture toughness of hybrid composites epoxy/clay/glass fiber. This study used epoxy for matrix material, clay and glass fibers woven roving types as reinforcement and polyaminoamide as catalist. Handy lay-up method was used for sample preparation. At first the clay was heated at 80 ° C for 1 hour at the oven is done to reduce the water content of clay. Epoxy mixed with clay variations of 0, 1, 2, 3, 4 and 5 wt%. Mixed using a mechanical Stirrer for 120 minutes with a round of 800 rpm at 80°C. The mixtures were cooled for 10 minutes,then put in a vacuum tube for 5 minutes, After that a mixture of clay and epoxy hardener is added again stirred for 5 minutes, then vacuum in the vacuum tube for 3 minutes. Then the matrix is poured into the glass mold, then compressed a glass fiber sheet with roll steel and poured another matrix, the process is repeated up to 4 sheets of glass fiber and then on the roll to a thickness of 3.2 mm.The process then allowed to stand for 24 hours at room temperature, put in heating for 2 hours at a temperature of 125oC and then the specimen was cut with a scroll saw machine into impact test specimens, and fracture toughness. The results show that the addition of clay 1wt% increase mechanical properties, but the addition of clay is more than 1wt% lower impact strength of hybrid composites of epoxy / clay / glass fiber. Impact test showed that the optimum clay fraction occurs in 1% to increase the impact strength of 30.16%. The highest fracture toughness of the composite hybrid epoxy / clay / glass fiber is achieved at 2% clay weight fraction, the fracture toughness increases by 19.09%, but the addition of more than 2% clay weight fraction lower fracture toughness strength. Key words: epoxy, fiber glass, clay, and the mechanical properties of hybrid composites. |
| download |