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Öğe Determination of the mechanical, thermal and physical properties of nano-CaCO3 filled high-density polyethylene nanocomposites produced in an industrial scale(SAGE PUBLICATIONS LTD, 2016) Sepet, Harun; Tarakcioglu, Necmettin; Misra, R. D. K.The objective of this study is to examine the mechanical, thermal, and physical properties of industrially produced nano-CaCO3 filled high-density polyethylene nanocomposites. For this purpose, 1.0, 3.0, 5.0, 10.0, and 15.0wt.% loading of nano-CaCO3 filled high-density polyethylene nanocomposites were prepared by the melt mixing method using a compounder system, which consist of industrial banbury mixer, single screw extruder, and granule cutting. The effect of nano-CaCO3 on mechanical, thermal, and physical properties of nano-CaCO3/HDPE nanocomposites was investigated. As a result of all experiments, the tensile strength of nano-CaCO3 filled high-density polyethylene nanocomposite increased about 5% with addition of 1.0wt.% nano-CaCO3. But did not increase further as more nano-CaCO3 was added. The flexural strength of nano-CaCO3 filled high-density polyethylene nanocomposite increased about 4.5% with addition of 15.0wt.% nano-CaCO3.Then increased slightly as the nano-CaCO3 content increased to 15.0wt.%. The tensile and flexural modulus of high-density polyethylene were significantly improved after (from 1.0wt.% up to 15.0wt.%) addition of nano-CaCO3. The tensile elongation at break and shore D hardness was consistently decreased with the addition of nano-CaCO3. The nano-CaCO3 filled high-density polyethylene nanocomposites were determined to have lower impact energy level than neat high-density polyethylene. The occurred fracture areas with the impact were detected by scanning electron microscopy examination. It is understood that fracture surface morphology changes when nano-CaCO3 ratio increases. The fracture surface changes were examined to determine the fracture mechanism of nano-CaCO3 filled high-density polyethylene nanocomposites. Density, melting flow index, differential scanning colorimetry, and vicat softening temperature were used to characterize the physical and thermal properties of the nanocomposites. The X-ray diffraction, the fourier transform infrared spectrophotometry, the transmission electron microscopy, and the scanning electron microscopy were used to analyze the structural characteristics of the nanocomposites. It is concluded that the addition of the nano-CaCO3 in high-density polyethylene has significantly influenced the mechanical, thermal, and physical properties of the nanocomposites.Öğe Effect of inorganic nanofillers on the impact behavior and fracture probability of industrial high-density polyethylene nanocomposite(SAGE PUBLICATIONS LTD, 2018) Sepet, Harun; Tarakcioglu, Necmettin; Misra, R. D. K.The main purpose of this work is to study how the morphology of nanofillers and dispersion and distribution level of inorganic nanofiller influence the impact behavior and fracture probability of inorganic filler filled industrial high-density polyethylene nanocomposites. For this study, nanoclay and nano-CaCO3 fillers-high-density polyethylene mixings (0, 1, 3, 5wt.% high-density polyethylene) was prepared by melt-mixing method using a compounder system. The impact behavior was examined by charpy impact test, scanning electron microscopy, and probability theory and statistics. The level of the dispersion was characterized with scanning electron microscopy energy dispersive X-ray spectroscopy analysis. The results showed rather good dispersion of both of inorganic nanofiller, with a mixture of exfoliated and confined morphology. The results indicated that the impact strength of the industrial nanocomposite decreased with the increase of inorganic particulate content. The impact reliability of the industrial nanocomposites depends on the type of nanofillers and their dispersion and distribution in the matrix.Öğe Investigation of mechanical, thermal and surface properties of nanoclay/HDPE nanocomposites produced industrially by melt mixing approach(SAGE PUBLICATIONS LTD, 2016) Sepet, Harun; Tarakcioglu, Necmetin; Misra, R. D. K.The main aim of this paper is to introduce mechanical, thermal and surface properties of produced industrially HDPE-based nanocomposites. For this purpose, 1.0, 2.0, 3.0, 4.0 and 5.0wt.% loading of nanoclay-reinforced HDPE nanocomposites made from the HDPE matrix were prepared by the melt mixing method using a compounder system, which consist of industrial banbury mixer, single screw extruder and granule cutting. The effect of nanoclay on mechanical, thermal and surface properties of nanoclay/HDPE nanocomposites was investigated. The tensile and flexural strength of nanoclay/HDPE nanocomposite increased by about 5% and 7%, respectively, with addition of 1.0wt.% nanoclay. But then it decreased slightly as the nanoclay content increased to 5.0wt.%. The tensile modulus and tensile elongation were decreased with the addition of 1.0wt.% nanoclay, but did not increase further as more nanoclay was added. The flexural modulus of HDPE was significantly improved after (from 1.0wt.% up to 5.0wt.%) addition of nanoclay. It was found that the scratch resistance of nanoclay/HDPE nanocomposite improved with addition of the nanoclay by SEM examination. Density, melting flow index (MFI), differential scanning colorimetry (DSC), and vicat softening temperature (VICAT) were used to characterize the physical and thermal properties of the nanocomposites. The X-ray diffraction (XRD), the Fourier transform infrared spectrophotometry (FTIR), and the scanning electron microscopy (SEM) were used to analyze the structural characteristics of the nanocomposites. It is concluded that the addition of the nanoclay in HDPE has significantly influenced the mechanical, thermal, and surface properties of the nanocomposites.Öğe Nano-partikül takviyeli yüksek yoğunluklu polietilen nanokompozitlerin üretimi ve mekanik özelliklerinin araştırılması(Selçuk Üniversitesi Fen Bilimleri Enstitüsü, 2014-06-18) Sepet, Harun; Tarakçıoğlu, NecmettinGünümüzde polimer nanokompozitler, dünya çapında araştırma ve geliştirme yatırımlarıyla dikkatleri üzerine çekmeyi başarmıştır. Üreticiler polimer nanokompozitlerin mekanik, termal ve fiziksel özelliklerinin iyi olması nedeniyle birçok alanda kullanmayı düşündüler. Bu nedenle polimer nanokompozitlerin araştırılması ve geliştirilmesi için önemli yatırımlar yapılmaktadır. Ancak, nanokompozitlerin üretimlerinde ortaya çıkabilecek problemlerden dolayı polimer nanokompozitlerin özelliklerinin endüstriyel ölçekte araştırılması gereksinimi ortaya çıkmıştır. Bu çalışmanın amacı, yüzeyi modifiye edilmiş nano kalsiyum karbonat (Nano CaCO3) ve organik olarak modifiye edilmiş montmorilonit (Nanokil) partiküllerinin yüksek yoğunluklu polietilenin(YYPE) mekanik, termal, fiziksel ve morfolojik davranışları üzerindeki etkisini araştırmaktır. YYPE matriksinden üretilmiş ağırlıkça %1, %2, %3, %4 ve %5 nanokil takviyeli YYPE ve ağırlıkça %1, %3, %5, %10 ve %15 nano takviyeli CaCO3 YYPE nanokompozitler banbury mikser ve tek vidalı ekstruder kullanılarak endüstriyel ölçekte üretilmiştir. Üretilen nanokompozit numunelerin ve saf YYPE‟ nin maksimum çekme gerilmesi, kopmadaki yüzde uzama, sekant modülü, maksimum eğme gerilmesi, eğme sekant modülü, darbe dayanımı, shore D sertliği ve çizilme dayanımı gibi mekanik özellikleri, camsı geçiş sıcaklığı (Tg) gibi termal özellikleri, yoğunluk, erime akış indeksi (MFI) ve yumuşama sıcaklık noktası gibi fiziksel özellikleri incelenmiştir. X-ışın difraksiyonu (XRD), fourier dönüşümlü kızılötesi spektroskopisi (FTIR), geçirimli elektron mikroskobu (TEM) ve tarama elektron mikroskobu (SEM), nanokompozitlerin ve saf YYPE‟nin morfolojik karakteristiklerini analiz etmek için kullanılmıştır. Tüm deney sonuçları, nanokil ve nano CaCO3 partiküllerinin, nanokompozitlerin mekanik, termal, fiziksel ve morfolojik davranışları üzerinde çok önemli etkileri olduğunu göstermiştir. Bu etkiler, ayrıntılı olarak açıklanmış ve sonuçları tartışılmıştır.
