Pengaruh variasi fraksi volume temperatur curing dan post-clustering terhadap karakteristik tekan komposit epoxy-hollow glass microspheres IM30K

Ritonga, Widyansyah (2014) Pengaruh variasi fraksi volume temperatur curing dan post-clustering terhadap karakteristik tekan komposit epoxy-hollow glass microspheres IM30K. Other thesis, Insititut Teknologi Sepuluh Nopember.

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Abstract

Dewasa ini penggunaan material komposit sudah sangat berkembang. Komposisi dari komposit juga sudah sangat beragam, namun penelitian tentang komposit Epoxy – Hollow Glass Microspheres (HGM) dengan variasi temperatur curing dan post-curing untuk karakteristik tekan masih sangat terbatas. Keunggulan yang dimiliki HGM antara lain memberikan bobot yang ringan, konduktivitas termal rendah, dan ketahanan terhadap tegangan kompresi yang tinggi. Dari keunggulan komposit tersebut, tujuan aplikasi pada penelitian ini dapat digunakan pada bemper atau body kendaraan sehingga memiliki kekuatan tekan yang lebih tinggi, berat total kendaraan lebih ringan dan efisiensi bahan bakarnya meningkat. Penelitian dilakukan dengan mencampurkan epoxy resin dan HGM. Spesimen uji tekan diproduksi sesuai dimensi ASTM D-695 dengan variasi fraksi volume HGM 15% hingga 20%. Spesimen menerima tiga perlakuan yang berbeda. Spesimen I di- curing pada temperatur kamar (± 27°C) ditahan selama 24 jam. Spesimen II di-curing pada temperatur kamar (± 7°C) ditahan selama 24 jam lalu post-curing pada temperatur 90°C selama 5 jam. Spesimen III di-curing pada temperatur 90°C ditahan selama 24 jam. Untuk temperatur curing 90°C setelah 24 jam komposit akan tetap dibiarkan dalam oven hingga temperatur oven sama dengan temperatur ruang. Untuk mempelajari perbedaan sifat mekanik yang terjadi, dilakukan pengujian tekan. Hasil yang didapatkan adalah kekuatan tekan dan ketangguhan komposit maksimum pada fraksi volume HGM 16% untuk spesimen I sebesar 67,19 MPa dan 6,02x10-3 J/mm3, Spesimen II sebesar 89,24 MPa dan 9,13x10-3 J/mm3, dan spesimen III sebesar 121,28 MPa dan 21,54x10-3 J/mm3. Diatas fraksi volume HGM tersebut kekuatan tekannya cenderung turun dengan nilai terendah pada fraksi volume HGM 20%. Terdapat perbedaan yang cukup besar dari ketiga perlakuan dengan fraksi volume HGM yang sama. Komposit yang di-curing temperatur 90°C selama 24 jam memiliki kekuatan tekan yang paling tinggi. Hal ini terjadi karena komposit yang di-curing pada temperatur tinggi mem iliki ikatan crosslink lebih banyak sehingga ikatan epoxy dan HGM lebih kuat dan nilai kekuatan tekan pada komposit akan meningkat.
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In this era, the using of composite material has highly developed. The composition of composite has also very varied, however the research about Epoxy-Hollow Glass Microspheres (HGM) composite with varied curing and post-curing temperature for compressive characteristic is very limited. The advantages of HGM are providing light weight, low termal conductivity, and high comprissive strength. Based on those advantages, the application of this research can be implemented for vehicle’s bumper and body material, so that total weight of vehicle is lighter and the fuel of vehicle can be more efficient. The research was conducted by mixing Epoxy resin and HGM. Compression test specimens were produced in accordance with ASTM D695 dimension with varied volume fraction of HGM of 15% until 20%. Specimens were given three different treatment. Specimen I had been on curing process at 27°C for 24 hours. Specimen had neem on curing process at ± 27°C for 24 hours and then post-curing process at 90°C for 5 hours. Specimen III had been on curing process at 90°C for 24 hours. At 90°C of 24 hours curing process, composite would be still in oven until oven temperature is same with room temperature. To know the difference in mechanical characteristic, then we should do compressive strength experiment. The results obtained with the addition of HGM the maximum compressive strength and thougness of the composite obtained in the addition of 16% for composites I 67,19 MPa and 6,02x10-3 J/mm3, composite II 89,24 Mpa and 9,13x10-3 J/mm3, and composite III 121,28 Mpa and 21,54x10-3 J/mm3. On top of the addition of 16% volume fraction of HGM compressive strength tends to decline with the lowest value at 20 % volume fraction of HGM. Curing temperature is effect on the compressive strength , there is a considerable difference between the results of the composite given curing. On composite given curing temperature of 90°C has a compressive strength greater than the composite given curing room temperature. This is because the composite given curing at high temperatures has a crosslink on matrix of composites larger so that the compressive strength of the epoxy - matrix composites with hollow glass microspheres will increase.

Item Type:	Thesis (Other)
Additional Information:	RSM 620.118 Rit p-1, 2014
Uncontrolled Keywords:	komposit, hollow glass microspheres, epoxy, curing, post-curing, uji tekan, composite, hollow glass microspheres, epoxy, curing, post-curing, compressive strength
Subjects:	T Technology > TL Motor vehicles. Aeronautics. Astronautics > TL240.5 Composite materials
Divisions:	Faculty of Industrial Technology > Mechanical Engineering > 21201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	15 Jan 2024 06:07
Last Modified:	15 Jan 2024 06:07
URI:	http://repository.its.ac.id/id/eprint/105487

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