Person: KARTAL, İLYAS
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KARTAL
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İLYAS
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Publication Open Access Bor Nitrür Partikülleriyle Takviye Edilmiş Vinil Ester Matrisli_x000D_ Kompozitlerin Mekanik Özelliklerinin İncelenmesi(2019-01-31) KARTAL, İLYAS; İLYAS KARTAL;Yalçın BOZTOPRAKSon yıllarda inorganik partiküllerle takviyelendirilmiş polimer matrisli kompozitler yaygın bir şekildekullanılmaktadır. Yapılan çalışmaların birçoğu, polimer malzemelere inorganik yapıların ilavesiyle elde edilenhibrid malzemeler üzerine yoğunlaşmıştır. Bu çalışmada, bor nitrür partikül takviyeli vinil ester kompozitmalzemeler üretilmiştir. Matris malzemesi olarak vinil ester reçinesi kullanılmıştır. Takviye malzemesi olarakise ortalama 70 nm boyutlarında olan hegzagonal bor nitrür partikülleri kullanılmıştır. Farklı oranlarda üretilenbor nitrür takviyeli vinil ester kompozit numunelerin çekme dayanımı, eğilme dayanımı, darbe dayanımı, aşınmadayanımı ve sertlik özellikleri incelenmiştir. Test numunelerini hazırlamak için kalıp malzemesi olarak silikontercih edilmiştir. Reaksiyon başlatıcı olarak %50 aktif metil etil keton peroksit, hızlandırıcı olarak ise % 6’lıkkobalt naftalat kullanılmıştır. Partiküllerin homojen dağılımını sağlamak ve topaklanmayı engellemek içinpartikül miktarının 5 katı oranında MEG (mono etilen glikol) ilavesiyle elde edilen karışım, ultrasonik karıştırıcıiçerisinde 30 dakika karıştırılmıştır. Vinil ester reçine içerisine bor nitrür ilavesi işlemine ağırlıkça % 0,5oranından başlanmış ve % 2’ye kadar devam edilmiştir. Elde edilen kompozit malzemenin darbe ve sertlikdeğerlerinde artış görülmüştür. Çekme, % uzama ve eğilme özelliklerinde azalma gözlemlenmiştir. Aşınmamiktarında ise azalma, dolayısıyla aşınma dayanımında artış olduğu görülmüştür.Publication Open Access Toughening of Epoxy Resin via Silane Terminated Urethane Including Pre-Hydrolyzed Tetraethoxysilane(ASIAN JOURNAL OF CHEMISTRY, 2014) KARTAL, İLYAS; Kartal, IlyasIn this Study, firstly; Silane terminated urethane was synthesized from poly(hexamethylene carbonate) diol and 3-isocyanatopropyl trimethoXysilane. Prepared solutions of inorganic part (silane terminated urethane + pre-hYdrolyzed tetraethoxysildne) were Mixed with epoxy-hardenet mixture to obtain hybrid solutions. Various hybrid Solutions were prepareclnsing different epoxy/inorganic part solution:compositions. Furthermore, ther'effect of silane terminated urethane on the mechanical and morphological properties of epoxy was investigated. The structure and pioperties of the composites are characterized using a scanning:electron Microscopy. Epoxy/silane, terminated I urethane hybrid materials were Subjected to examinations to obtain their tensile strength, three point bending properties, hardness, izod impact strength. Incorporation of silane terminated urethane into the epoxy resin greatly Modified the impact behavior of hybrids.Publication Metadata only Monte Carlo simulations study on gamma ray-neutron shielding characteristics for vinyl ester composites(WILEY, 2021) KARTAL, İLYAS; Akkurt, Iskender; Malidarre, Roya Boodaghi; Kartal, Ilyas; Gunoglu, KadirThe current study aims to report the gamma ray-neutron attenuation parameters of eight types of vinyl ester pumice (V-P) composites for wide energy ranges of 511-2140 keV via MCNPX and FLUKA codes. The radiation shielding properties of these composites were presented graphically and are discussed in detail in this study. From the obtained results, it can be concluded that the MCNPX and FLUKA outcomes are in agreement with each other, and also the FLUKA code can be used as an alternative technique to determine the attenuation features of vinyl ester composites. Besides, the linear attenuation coefficient and total macroscopic cross sections' ( n-ary sumation (t)) dependencies on the density and also mass attenuation coefficient were found for all selected samples. To sum up, findings show that composite coded as V-P50 can be a good competitive candidate in terms of gamma rays and neutron shielding.Publication Open Access Investigation of Properties of Fluorine Containing Hybrid Coatings Intended for Use in Printing(2015) KARTAL, İLYAS; Beytut, Hüseyin; Cakir, Mustafa; Kartal, Ilyas; Sengul, Muharrem; Tutak, DoganPublication Metadata only Fabrication and characterization of hazelnut shellpowder with reinforced polymer compositenanofibers(2018-09-14) KARTAL, İLYAS; OKTAR, FAİK NÜZHET; EKREN, NAZMİ; İNAN, AHMET TALAT; GÜNDÜZ, OĞUZHAN; CESUR, SÜMEYYE; Şengör İ., Cesur S., Kartal İ., Oktar F. N., Ekren N., İnan A. T., Gündüz O.Publication Open Access Polipropilenin Eğilme Özelliklerine Geri Dönüşümlü EPDM_x000D_ Boyutlarının Etkisi(2019-03-31) DEMİRER, HALİL; Halil DEMİRER;Yunus TEZCAN;Kenan BÜYÜKKAYA;İlyas KARTALEPDM (etilen propilen dien monomer) önemli bir sentetik kauçuktur ve birçok farklı sektörde önemli miktarlarda kullanılır. Kullanımmiktarındaki artışa paralel olarak EPDM atığı ortaya çıkmaktadır. Bu tür malzemeler, çapraz bağlanmalarından dolayı tekrar eritiliptekrar işlenme ihtimaline sahip değildir. EPDM atıkları, genellikle, ithal bazlı plastik endüstrisi için zaten önemli bir kayıp olup yakıtolarak tüketilmektedir. EPDM kalıntılarının değerlendirilmesinin bir başka yöntemi, bunları küçük boyutlara getirerek farklıpolimerlere eklemektir. Bu çalışmanın amacı atık EPDM tozlarının, polipropilen EPDM karışımlarının bükülme özellikleri üzerindekietkisini araştırmaktır. Dört farklı boyda (0-50, 50-75, 75-150 ve 150-300µ) öğütülmüş EPDM, ekstrüzyon yoluyla dört farklı oranında% 0, % 10, % 20, % 30 ve % 50 ile polipropilene eklendi. Bu karışımlara ayrıca % 1 oranında kaydırıcı ve % 0.2 oranında antioksidanilave edildi. Test numuneleri bu karışımlardan enjeksiyonlu kalıplama ile hazırlandı. Standartlara göre hazırlanan numunelere eğilmeve HDT testi yapıldı.Publication Metadata only Effect of hornbeam sawdust size on the mechanical properties of polyethylene composites(ICE PUBLISHING, 2020) KARTAL, İLYAS; Kartal, IlyasComposite materials obtained with natural and sustainable fibers can be used successfully in many areas on their own. In recent years, high-strength fibers such as hemp, sisal, linen, jute, wood sawdust and bamboo are more preferred in composite materials. In this study, the effect of the hornbeam sawdust size on the mechanical properties of polyethylene was investigated. For this purpose, different sizes of hornbeam sawdust were added to polyethylene. Hornbeam sawdust was added to the polyethylene matrix in four different weight ratios (5, 10, 15 and 20%) by way of the extrusion method. Test samples were prepared out of those mixtures by injection-molding. Tensile, Izod impact and hardness tests were performed on the samples. The elastic modulus increased with increasing hornbeam sawdust content. However, elongation at break and Izod impact strength values decreased. Modulus of elasticity, tensile strength, elongation at break and Izod impact strength values decreased with increasing hornbeam sawdust size. The morphology of composite samples was examined by scanning electron microscopy. The results show that the hornbeam sawdust can be used as a filler in polymer-based composites.Publication Metadata only Preparation of fluorine containing hybrid coatings: investigation of coating performance onto ABS and PMMA substrates(WILEY, 2011) KARTAL, İLYAS; Kahraman, Memet Vezir; Akdemir, Zumrut Seden; Kartal, Ilyas; Kayaman-Apohan, Nilhan; Gungor, AtillaUV-curable fluorinated organic-inorganic hybrid coatings were prepared by the sol-gel technique. Perfluorinated urethane modified alkoxysilane was synthesized by the reaction between perfluoro alcohol and 3-isocyanatopropyltrimethoxysilane. The prepared formulations were applied onto poly(methyl methacrylate) (PMMA) and acrylonitrile butadiene styrene (ABS) panels and polymerized by UV-curing. The properties of the hybrid coatings such as hardness, chemical resistance, thermal stability, surface morphology, double bond conversion, and also contact angle measurements were investigated. Contact angle measurements have shown that the addition of fluorinated silane precursor to the hybrid system improved the water repellency and increased the contact angle from 65 degrees to 106 degrees. Copyright (C) 2009 John Wiley & Sons, Ltd.Publication Metadata only The effect of chestnut wood flour size on the mechanical properties of vinyl ester composites(ICE PUBLISHING, 2020) DEMİRER, HALİL; Kartal, Ilyas; Nayci, Gulsah; Demirer, HalilGreen composites are a special class of composites in which at least one of the components is obtained from natural resources. They are an alternative to traditional composites because of their useful properties such as biodegradability, low cost, easy processability, sound insulation and recycling. Green composites, which emerge as environmentally friendly polymeric composite materials, offer techno-economic advantages in commercial and engineering applications and are among the widely dealt subjects due to the very high demand from the global market. The aim of this study is to investigate the effect of chestnut wood flour size on the mechanical properties of chestnut-wood-flour-filled vinyl ester composites. With this aim, composite specimens were produced by using vinyl ester polymer as the matrix material and chestnut wood flour in three different sizes (0-150, 150-315 and 315-400 mm) as the natural filler. In each size combination, four different matrix/filler ratios (5, 10, 15 and 20% by weight) were adopted. These mixtures were then poured into Teflon moulds to produce the test specimens. Izod impact, three-point bending, hardness and tensile strength tests were performed on the composite specimens. In addition, morphological investigations were performed on the fractured surfaces of the specimens by using scanning electron microscopy. It is concluded that composites with a small-sized chestnut wood flour as the filler have superior properties for composite applications.Publication Open Access Improvement of the surface properties of polystyrene sheetsvia UV curable organic-inorganic hybrid coatings(2016-06-06) DEMİRER, HALİL; KARTAL, İLYAS; ÇAKIR, MUSTAFA; DEMİRER H., KARTAL İ., ÇAKIR M.This study describes the synthesis of silane terminated urethane, aimed at adding into epoxy acrylate, for the coating purposes. For this aim, firstly, silane terminated urethane was synthesized by the reaction between poly(hexamethylene carbonate) diol and 3-isocyanatopropyltrimethoxysilane. Pre-hydrolyzed TEOS and MEMO mixture was added to the silane terminated urethane. This solution was then mixed with organic part (epoxy acrylate and HDDA) to obtain hybrid solutions. Different organic-inorganic hybrid formulations were applied on polystyrene sheet surfaces by using applicators. The performance of the coatings on polystyrene sheets was investigated by applying physical and chemical tests. The results have shown that physical and chemical properties of polystyrene sheet surfaces were significantly improved.