Karakterisasi Termomekanik dan Optik Komposit PMMA/Zirkon Terdegradasi Termal

Sari, Yuliani Purnama (2022) Karakterisasi Termomekanik dan Optik Komposit PMMA/Zirkon Terdegradasi Termal. Masters thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Penelitian ini dilakukan dengan tujuan untuk mengetahui sifat termomekanik dan sifat optik komposit PMMA/zirkon mendapat perlakuan termal sehingga terdegradasi. Pasir puya dari Kereng Pangi, Kalimantan Tengah merupakan sumber zirkon yang digunakan. Serbuk zirkon sebagai pengisi disintesis melalui tahap preparasi, pencampuran dengan HCl, dan reaksi dengan NaOH. Sementara itu, komposit disintesis dengan metode pelarutan fasa cair. Variasi fraksi berat pengisi yang digunakan adalah 0,25; 0,5; 0,75; dan 1 %berat. Degradasi dilakukan menggunakan tungku pemanas (oven) pada temperatur 40, 65, dan 70°C selama 6 jam. Identifikasi fasa tunggal zirkon pada hasil sintesis serbuk serbuk zirkon dikonfirmasi menggunakan karakterisasi XRD dan spektroskopi FTIR. Kemudian serbuk zirkon dijadikan pengisi komposit dengan matriks PMMA dan keberhasilan sintesisnya dikonfirmasi dengan XRD dan FTIR yang ditandai dengan tidak adanya puncak difraksi maupun serapan infrared selain milik zirkon dan PMMA. Komposit PMMA/zirkon yang telah didegradasi terbukti mengalami penurunan intensitas serapan infrared. Karakterisasi termal DSC-TGA menunjukkan bahwa zirkon berperan untuk meningkatkan kestabilan termal komposit terdegradasi yang dapat diamati dengan membandingkan data entalpi dari komposit PMMA/zirkon dan PMMA tanpa zirkon. Secara umum, semakin banyak zirkon, semakin kecil perubahan entalpi sistem terhadap peningkatan temperatur degradasi. Sifat termomekanik komposit yang diketahui dengan DMA menunjukkan bahwa semakin besar komposisi zirkon, semakin tinggi modulus simpan, dan semakin tinggi temperatur yang diperlukan untuk bertransisi. Selain itu, semakin tinggi temperatur degradasi akan cenderung menunrunkan nilai modulus simpan komposit. Sementara itu, transmitansi komposit cenderung menurun seiring dengan bertambahnya komposisi zirkon dan temperatur degradasi terutama pada panjang gelombang 600 nm (cahaya tampak).
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This study has been carried out with the aim of knowing the thermomechanical and optical properties of PMMA/zircon composites after receiving thermal degrading treatment. Puya sand from Kereng Pangi, Central Kalimantan is the source of the zircon that be used. Zircon powder as filler was synthesized through the preparation step, mixing with HCl, and reaction with NaOH. Meanwhile, the composites were synthesized by the liquid phase mixing method. The variation of the weight fraction of the filler used are 0.25; 0.5; 0.75; and 1 wt.%. The degradation was carried out using an oven at temperatures of 40, 65, and 70°C for 6 hours. The identification of single-phase zircon in the synthesized zircon powder was confirmed using XRD characterization and FTIR spectroscopy. Then the zircon powder was used as a composite filler with PMMA matrix and the success of the synthesis was confirmed by XRD and FTIR which were characterized by the absence of diffraction and infrared peaks other than those of zircon and PMMA. PMMA/zircon composites that have been degraded have been shown to decrease the intensity of infrared absorption. Zircon functions in increasing the thermal stability of the degraded composite which can be observed by comparing the enthalpy data of PMMA/zircon composites and PMMA without zircon. In general, the more zircon, the smaller the enthalpy change of the system with increasing degradation temperature. The thermomechanical properties of the composites known by DMA showed that the larger the zircon composition, the higher the storage modulus, and the higher the temperature required for transition. The higher the degradation temperature, the lower the composite storage modulus. Meanwhile, the transmittance of the composites tends to decrease with increasing zircon composition and degradation temperature, especially at a wavelength of 600 nm (visible light).

Item Type:	Thesis (Masters)
Uncontrolled Keywords:	degradasi, komposit PMMA/zirkon, modulus simpan, transmitansi, degradation, PMMA/zirkon composites, storage modulus, transmittance.
Subjects:	Q Science > QC Physics > QC173.4.C63 Composite materials
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45101-(S2) Master Thesis
Depositing User:	YULIANI PURNAMA SARI
Date Deposited:	16 Feb 2022 05:40
Last Modified:	02 Nov 2022 02:37
URI:	http://repository.its.ac.id/id/eprint/94188

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