Analisis Kekuatan Bending Material Komposit Plat Dwikuitub pada Teknologi Fuel Cell

Abstract

Pengujian ini bertujuan untuk mengkajian pengaruh komposisi plastic polipropilen (PP) dan karbon aktif (KA) berupa bahan komposit plastik. Bahan komposit plastik dicampur menggunakan internal mixer pad a suhu proses 220 dengan putara 50 rpm. Selanjutnya dicetak dengan ukuran panjang 7 00 mm, Iebar 75 mm dan tebal 2,5 mm. Proses pencetakan sampel dilakukan dengan metode pengacuan mampatan (hot press/ compression moulding) dengan tekanan 1500 MPa pada suhu 200°C dan waktu tahan 30 menit. Selanjutnya sampel dipotong mengikuti dimensi pengujian bending dengan standart ASTM D D790-03 dengan ukuran 100 mm x 12.7 mm x 2.5 mm. Berdasarkan hasil pengujian komposit karbon aktif polipropilen komposisi pertama nilai dari maximum point stress 36.95 MPa dan modulus elastisitas 4.3096 Mpa, komposisi kedua nilai dari maximum point stress 34.58 MPa dan modulus elastisitas 3.377 MPa. Kondisi ini menunjukkan peningkatan komposisi karbon aktif terhadap polimer polipropilen memberikan pengaruh terhadap penurunan nilai kekuatan bending. This study aims to this study was to examine the effect of polypropylene (PP) plastic and activated carbon {AC) composition in a plastic composite material. The composite material was mixed using an internal mixer at a processing temperature of 220°C and a speed of 50 rpm. The mixture was then molded with dimensions of 700 mm in length, 75 mm in width, and 2,5 mm in thickness. The sample molding was performed using a compression molding method with a pressure of 1500 MPa at 250°C and a holding time of 300 minutes. Subsequently, the samples were cut according to the bending test dimensions following ASTM D790-03 standards, with dimensions of 700 mm x 12.7 mm x 2. 5 mm. The test results for the polypropylene-activated carbon compos;te in the first composition showed a maximum stress point of 36.95 MPa and an elastic modulus of 4.3096 MPa, while the second composition showed a maximum stress point of 34.58 MPa and an elastic modulus of 3.377 MPa. These findings indicate that increasing the activated carbon composition in polypropylene polymer results in a reduction in bending strength.