Sifat Termo-Mekanik Dan Optik Komposit Pmma Berpengisi Kuarsa Dan Zirkon

Hilmi, Allif Rosyidy (2023) Sifat Termo-Mekanik Dan Optik Komposit Pmma Berpengisi Kuarsa Dan Zirkon. Doctoral thesis, Institut Teknologi Sepuluh Nopember.

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Abstract

Pengaruh pengisi silika kuarsa (SiO2, q) dan zirkon (ZrSiO4, z) pada sifat termo-mekanik dan optik komposit bermatriks PMMA telah dipelajari menggunakan dynamic mechanical analyzer (DMA), fourier-transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV-Vis) dan differential scanning calorimetry (DSC)/thermal gravimetric analysis (TGA). Serbuk silika kuarsa dan zirkon diperoleh dari pengolahan pasir alam Kalimantan Selatan dan Kalimantan Tengah. Sifat termomekanik DMA ditentukan dalam mode tarik (E’). Konsentrasi maksimum pengisi adalah 5 wt.%. Modulus simpan maksimum (E') dicapai oleh komposit dengan konsentrasi maksimum silika kuarsa dan zirkon, namun konsentrasi tersebut berakibat pada turun drastisnya transparansi. Dalam upaya optimasi kombinasi sifat mekanik dan optik, dilakukan kajian lebih mendalam pada komposit z-1% dan q-2,5%. Hasilnya adalah, berturut-turut, modulus simpan meningkat sebesar 49% dan 46% terhadap PMMA murni, nilai Tg bergeser ke temperatur yang lebih tinggi sebesar 7 ºC dan 4 ºC (11% dan 4% di atas PMMA murni), dan perolehan termomekanik secara umum jauh lebih tinggi daripada kehilangan transmitasinya yang sebesar 1%–3%. Selanjutnya, komposit PMMA/zirkon dipilih sebagai komposit untuk uji degradasi sifat termamokanik dan optik akibat perlakuan panas dan radiasi inframerah (IR). Perlakuan panas dilakukan pada temperatur 55 dan 70 ºC selama 6 jam. Sedangkan untuk perlakuan radiasi IR dilakukan dengan intensitas 50 dan 150 lx selama 1 jam. Paparan IR mengakibatkan material menjadi getas, terjadi pergeseran Tg (misalnya, Tg berkurang sebesar 23 ºC untuk PZ000IR-1 dan 11 ºC untuk PZ050IR-1), penurunan transmitansi (misalnya, transmitansi berkurang sebesar 40% untuk PZ000IR-2) dan modulus simpan yang drop secara siginifikan ketika temperatur mencapai Tg (kemiringan modulus bertambah 9-11 kali untuk yang terpapar IR-2). Untuk komposit dengan perlakuan termal, secara umum, energi termal menurunkan sifat termo-mekanik komposit menurunkan nilai Tg dan energi bandgap
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The effect of silica quartz (SiO2, q) and zircon (ZrSiO4, z) fillers on the thermo-mechanical and optical properties of PMMA-matrix composites has been studied using a dynamic mechanical analyzer (DMA), Fourier-transform infrared spectroscopy (FTIR), ultraviolet–visible spectroscopy (UV-Vis) and differential scanning calorimetry (DSC)/thermal gravimetric analysis (TGA). Quartz silica and zircon powders are obtained from natural sand processing at South Kalimantan and Central Kalimantan. The thermomechanical properties of DMA are determined in the tensile mode (E'). The maximum concentration of filler is 5 wt.%. The maximum storage modulus (E') is achieved by the composite with the maximum concentration of silica quartz and zircon, but these concentrations result in a drastic drop in transparency. In an effort to optimize the combination of mechanical and optical properties, a more in-depth study was carried out on the z-1% and q-2,5% composites. The result is that, respectively, the storage modulus increases by 49% and 46% over pure PMMA, the Tg's shift to higher temperatures by 7 °C and 4 °C (11% and 4% over pure PMMA), and the thermomechanical properties are generally much higher than pure PMMA, higher than the transmittance loss of 1%–3%. Furthermore, the PMMA/zircon composite was selected as a composite for the degradation of thermodynamic and optical properties due to heat treatment and infrared (IR) radiation. Heat treatment was carried out at 55 and 70 ºC for 6 hours. As for the IR, radiation treatment was carried out with an intensity of 50 and 150 lx for 1 hour. IR exposure causes the material to become brittle, a shift in Tg occurs (for example, Tg decreases by 23 ºC for PZ000IR-1 and 11 ºC for PZ050IR-1), a decrease in transmittance (for example, transmittance decreases by 40% for PZ000IR-2) and a drop in storage modulus significantly when the temperature reaches Tg (modulus slope increases 9-11 times for those exposed to IR-2). For composites with thermal treatment, in general, thermal energy decreases the thermo-mechanical properties of the composite, decreasing the Tg value and bandgap energy

Item Type:	Thesis (Doctoral)
Uncontrolled Keywords:	komposit PMMA, silika kuarsa, zirkon, termomekanik, optik, degradasi, perlakuan panas/termal, dan paparan inframerah; PMMA composites, quartz silica, zircon, thermomechanics, optics, degradation, heat/thermal treatment, and infrared exposure
Subjects:	Q Science > QC Physics > QC173.4.C63 Composite materials
Divisions:	Faculty of Science and Data Analytics (SCIENTICS) > Physics > 45001-(S3) PhD Thesis
Depositing User:	Allif Rosyidy Hilmi
Date Deposited:	05 Sep 2023 08:57
Last Modified:	05 Sep 2023 08:57
URI:	http://repository.its.ac.id/id/eprint/104924

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