Analisis Pengaruh Jenis Dan Komposisi Poliamida Terhadap Sifat Reologi Dan Sifat Mekanik Feedstock Proyektil Frangible

Rochidiyanti, Fransisca Angela Margaretha (2022) Analisis Pengaruh Jenis Dan Komposisi Poliamida Terhadap Sifat Reologi Dan Sifat Mekanik Feedstock Proyektil Frangible. Other thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Proyektil frangible dirancang khusus agar bisa hancur ketika mengenai permukaan yang keras. Dalam pengembangannya, komposit Cu-polimer digunakan sebagai bahan penyusunnya. Proses manufaktur proyektil frangible salah satunya dapat dilakukan dengan metode ekstrusi untuk membuat feedstock dengan karakteristik tertentu yang sesuai dan dilanjutkan dengan injection molding. Karakteristik yang dibutuhkan seperti perlu memiliki sifat reologi yaitu berupa nilai viskositas yang sesuai dengan yang dibutuhkan untuk proses injection molding serta memiliki sifat mekanik seperti nilai kekuatan tekan dan kekerasan yang sesuai dengan karakteristik proyektil frangible. Pada tugas akhir ini, dilakukan penelitian pada pengaruh jenis dan komposisi poliamida terhadap sifat reologi dan sifat mekanik pada feedstock proyektil frangible. Dilakukan juga pengujian Scanning Electron Microscopy (SEM) untuk menganalisis morfologi permukaan feedstock. Feedstock dibuat menggunakan metode ekstrusi dengan jenis poliamida 6 dan poliamida 12, serta komposisi poliamida berkisar antara 10, 14, dan 20wt%. Pada penelitian ini dilakukan perhitungan nilai viskositas untuk menganalisa aliran feedstock, pengujian kekerasan untuk menganalisis kekerasan feedstock, dan pengujian kekuatan tekan untuk menganalisis kekuatan tekan feedstock. Dilakukan juga pengujian Scanning Electron Microscopy (SEM) untuk menganalisis morfologi permukaan feedstock. Sifat reologi feedstock yaitu nilai viskosiats diestimasi menggunakan persamaan berdasarkan literatur. Nilai viskositas terendah terdapat pada feedstock Cu/PA6 (20wt%-Cu) sebesar 140,1323 Pa.s, nilai viskositas
tertinggi terdapat pada feedstock Cu/PA12 (10wt%-Cu) sebesar 1326,753 Pa.s. Nilai viskositas akan menurun seiring banyaknya komposisi poliamida. Hal ini akan menyebabkan feedstock menjadi lebih mudah mengalir. Pada hasil pengujian sifat mekanik yaitu pengujian tekan dan pengujian kekerasan menunjukkan bahwa semakin bertambah komposisi poliamida akan menurunkan sifat mekanik. Nilai kekerasan tertinggi terdapat pada feedstock Cu/PA6 dengan (14wt%-Cu) sebesar 64,5 HV, nilai kekerasan terkecil terdapat pada feedstock Cu/PA12 (20wt%-Cu) sebesar 45,6 HV. Kekuatan tekan tertinggi terdapat pada feedstock Cu/PA6 (14wt%-Cu) sebesar 141,07 MPa, kekuatan tekan terkecil terdapat pada feedstock Cu/PA12 (20wt%-Cu) yaitu sebesar 100,4 MPa. Nilai sifat mekanik pada 10wt%-Cu menurun diperkirakan akibat adanya void. Pada hasil pengujian SEM ditunjukkan adanya void pada variasi 10wt%-Cu.
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Frangible projectiles are specially designed so that the projectiles can disintegrate when they hit a hard surface. In its development, Cu-polymer composites were used as its constituent materials. In the frangible projectiles manufacturing process, one of them can be done with the extrusion method to make feedstock with certain appropriate characteristics and continued by injection moulding. The characteristics needed such as the need to have rheological properties are in the form of viscosity values that are under what is required for the injection moulding process and have mechanical properties such as the values of compressive strength and hardness that correspond to characteristics of frangible projectiles. In this final project, conducted research on the influence of polyamide type and composition on rheological properties and mechanical properties of feedstock frangible projectiles. Scanning Electron Microscopy (SEM) testing was also carried out to analyze the surface morphology of the feedstock. The feedstock is made using the extrusion method with polyamide 6 and polyamide 12, and the polyamide composition ranges from 10, 14, and 20wt%. In this study, viscosity value calculations were carried out to analyze feedstock flow, hardness testing for analyzing the hardness value of the feedstock, and compressive strength testing for analyzing the compressive strength of the feedstock. Also conducted Scanning Electron Microscopy (SEM) testing to analyze the surface morphology of the feedstock. Rheology properties of feedstock, which is the value of viscosity are estimated using equations based on literature. The lowest viscosity value is found in the Cu/PA6 feedstock (20wt%-Cu) of 140.1323 Pa.s, and the highest viscosity value is found in the Cu/PA12 feedstock (10wt%-Cu) of 1326,753 Pa.s. The viscosity value will decrease with the abundance of polyamide compositions. This will cause the feedstock to become more flowable. The results of mechanical properties testing, namely compressive strength testing and hardness testing, show that increasing the composition of polyamide will reduce mechanical properties. The highest hardness value is found in the Cu/PA6 feedstock with (14wt%-Cu) of 64.5 HV, the smallest hardness value is found in the Cu/PA12 feedstock (20wt%-Cu) of 45.6 HV. The highest compressive strength is found in the Cu/PA6 feedstock (14wt%-Cu) of 141.07 MPa, the smallest compressive strength is found in the Cu/PA12 feedstock (20wt%-Cu) which is 100.4 MPa. The value of mechanical properties at 10wt%-Cu decreased estimated due to voids. In the SEM test results, it was shown that there was a void in the 10wt%-Cu variation.

Item Type:	Thesis (Other)
Additional Information:	RSMt 668.423 5 Roc a-1 2022
Uncontrolled Keywords:	Feedstock, Komposit Cu-PA, Viskositas, Sifat Mekanik, Feedstock, Composite Cu-PA, Viscosity, Mechanical Propertie
Subjects:	T Technology > TN Mining engineering. Metallurgy > TN752.I5 Steel--Heat treatment
Divisions:	Faculty of Industrial Technology > Material & Metallurgical Engineering > 28201-(S1) Undergraduate Thesis
Depositing User:	Mr. Marsudiyana -
Date Deposited:	10 Feb 2025 03:53
Last Modified:	10 Feb 2025 03:53
URI:	http://repository.its.ac.id/id/eprint/118585

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