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Wear Properties of Hybrid Epoxy Composites Reinforced with Carbon/Kevlar/Glass Fabrics

100%
Kartal İ., Demirer H.
Acta Physica Polonica A
|
2017
|
vol. 131
|
issue 3
559-561
EN
The aim of this study is to investigate the effect of hybridization of fabrics on wear properties of epoxy composites and to relate them to impact properties. With this aim carbon/glass/Kevlar fabrics were hybridized to reinforce epoxy composites. Epoxy composites reinforced with only carbon, glass or Kevlar fabrics were also prepared as reference composites. The wear tests were carried out using a pin-on-disk device. The wear surfaces of composite specimens were examined by scanning electron microscopy to investigate the different behavior of three distinct fabrics in the hybrid composites. The results have shown that carbon fabric reinforced epoxy composite exhibited the highest wear resistance, whereas the wear resistance of Kevlar fabric reinforced epoxy composite was the lowest. As expected, the wear resistance of hybrid composites was lower than that of only carbon fabric reinforced composites.
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Improvement of the Surface Properties of Polystyrene Sheets via UV Curable Organic-Inorganic Hybrid Coatings

81%
Demirer H., Kartal İ., Çakir M.
Acta Physica Polonica A
|
2017
|
vol. 131
|
issue 3
555-558
EN
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.
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