Sholicha, Setya Permata (2022) Karakterisasi Mekanik Dan Optik Komposit PMMA/ZIRKON Terpapar Radiasi Inframerah. Other thesis, Institut Teknologi Sepuluh Nopember.
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Abstract
Penelitian ini bertujuan untuk mengetahui sifat optik dan mekanik komposit Poly(methyl methacrylate)(PMMA)/zirkon terpapar radiasi inframerah. Serbuk zirkon yang digunakan sebagai pengisi dalam komposit berasal dari pasir puya daerah Kereng Pangi, Kalimantan Tengah, yang disintesis dengan beberapa tahapan seperti tahap preparasi, pencampuran dengan HCl, dan reaksi dengan NaOH. Sementara, untuk komposit PMMA/zirkon disintesis dengan metode pelarutan fasa cair. Variasi fraksi berat pengisi yang digunakan dalam penelitian ini adalah 0; 0,5; dan 1 wt.%. Jenis radiasi pada paparan yang dipilih adalah inframerah yang memiliki panjang gelombang 1075 nm dengan waktu penyinaran selama 1 jam dan dengan variasi intensitas radiasi 50 dan 150 lux. Karakterisasi yang dilakukan terdiri atas difraksi sinar-x (XRD), spektroskopi infra merah (FTIR), spektrospkopi UV-vis, thermogravimetric/differential thermal analysis (TG/DTA) dan dynamic mechanical analysis (DMA). Hasil karakterisasi XRD dan FTIR menunjukkan bahwa semua hasil sintesis berupa komposit PMMA/zirkon. Selanjutnya hasil FTIR menunjukkan terjadinya penurunan intensitas puncak serapan yang mengindikasikan bahwa adanya kerusakan rantai polimer (PMMA) komposit PMMA/zirkon terpapar radiasi inframerah. Sementara itu, karakterisasi TG/DTA menunjukkan bahwa. terjadi penurunan energi termal yang diserap komposit dan kecepatan penurunan massa sebesar 5,2% pada komposit PMMA/zirkon 0,5 wt.%, dan 3,7% pada 1 wt.% untuk intensitas paparan 50 lux dan 150 lux. Sifat optik dari komposit PMMA/zirkon diketahui melalui karakterisasi UltraViolet-Visible (UV-Vis) spektroskopi. Komposit dengan 1 wt.% terpapar 150 lux memiliki nilai transmitansi terendah sebesar 0.11% pada daerah UV-C, 1.98% pada daerah UV-B, 2.17% pada daerah UV-A, dan 16.18% di sinar tampak. Sementara itu, komposit dengan 0,5 wt.% zirkon dengan paparan yang sama memiliki transmitansi berturut-turut 0,22; 3,32; 3,34; dan 27,29%. Terakhir, sifat termomekanik komposit PMMA/zirkon terpapar yang diuji menggunakan DMA menunjukkan bahwa komposit dengan konsentrasi 0,5 wt.% yang dipapar dengan intensitas 50 lux menyebabkan penurunan modulus simpan sebanyak 50% dan dipapar dengan intensitas 150 lux menyebabkan naiknya modulus simpan sebanyak 58% pada temperatur 30-100°C.
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This study aims to determine the optical and mechanical properties of poly (methyl methacrylate)(PMMA)/zircon composites exposed by infrared radiation. The zircon powder used as filler in the composite came from puya sand in the Kereng Pangi area, Central Kalimantan, which was synthesized in several stages such as preparation, mixing with HCl, and reaction with NaOH. Meanwhile, PMMA/zircon composites were synthesized by the liquid phase dissolving method. The variation of the weight fraction of the filler used in this study was 0; 0.5; and 1 wt.%. The type of radiation selected for exposure is infrared which has a wavelength of 1075 nm with an irradiation time of 1 hour and with variations in radiation intensity of 50 and 150 lux. The characterizations consisted of x-ray diffraction (XRD), infrared spectroscopy (FTIR), UV-vis spectroscopy, thermogravimetric/differential thermal analysis (TG/DTA), and dynamic mechanical analysis (DMA). The results of XRD and FTIR characterization showed that all of the synthesis products were PMMA/zircon composites. Furthermore, the FTIR results showed a decrease in the absorption intensity which indicated that polymer chain (PMMA) of the PMMA/zircon composite was damaged when the composite was degrades by infrared radiation. Meanwhile, the thermogravimetric/differential thermal analysis (TG/DTA) characterization of the degraded samples showed that there was a decrease in the thermal energy absorbed by the composite and the rate of mass loss was 5.2% in the 0.5 wt.% PMMA/zircon composite and 3,7% at 1 wt.%, for 50 and 150 lux degradation intensity. The optical properties of PMMA/zircon composites were known through the spectroscopic Ultra Violet-Visible (UV-Vis) characterization. Composites with the 1 wt.% zircon exposed to 150 lux had the lowest transmittance value of 0.11% in the UV-C region, 1.98% in UV-B region, 2.17% in the UV-A region, and 16.18% in the visible light. Meanwhile, the composite with 0,5 wt.% zircon with the same exposure had a respective transmittance of 0.22; 3.32; 3.34; and 27.29%. Finally, the thermomechanical properties of the exposed PMMA/zircon composite tested using DMA showed that the composite with a concentration of 0.5 wt.% degraded with an intensity of 50 lux caused a decrease in the storage modulus by 50% and an intensity of 150 lux caused an increase in the storage modulus by 58% at temperature 30-100 °C.
| Item Type: | Thesis (Other) |
|---|---|
| Additional Information: | RTFi 620.189 362 Sho k-1 |
| Uncontrolled Keywords: | komposit PMMA/zirkon, paparan radiasi inframerah, transmitansi, modulus simpan. |
| Subjects: | T Technology > TN Mining engineering. Metallurgy > TN490 Zircon mines and mining |
| Divisions: | Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45101-(S2) Master Thesis |
| Depositing User: | Mr. Tondo Indra Nyata |
| Date Deposited: | 17 Jan 2023 06:47 |
| Last Modified: | 17 Jan 2023 06:47 |
| URI: | http://repository.its.ac.id/id/eprint/95438 |
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