Vinilester Kompozit Malzemenin Mekanik Özellikleri Üzerine Al2O3 Partiküllerinin Etkisi

Yıl 2022, Sayı: 41, 48 - 53, 30.11.2022

Yalçın Boztoprak

https://doi.org/10.31590/ejosat.1016663

Öz

Vinil ester reçineleri, partikül ve fiber takviyeli kompozitlerde matris malzemeleri olarak yaygın olarak kullanılmaktadır. Günümüzde polimer matrisli kompozitlerin mekanik özelliklerini artırmak için mikron boyutlu mikro yapılarda da partiküller tercih edilmektedir. Bu çalışmada 1-3 mikron boyutlarında alüminyum oksit partikülleri ile güçlendirilmiş vinil ester matrisli kompozitler üretilmiştir. Hazırlanan numunelerin çekme, 3 noktada eğilme, sertlik, darbe ve aşınma özellikleri gibi mekanik özellikleri incelenmiştir. Numune üretiminde teflon kalıp tercih edilmiştir. Reaksiyonda başlatıcı olarak %50 aktif metil etil keton peroksit ve hızlandırıcı olarak %6 kobalt naftalat kullanılmıştır. Vinil ester reçinesine ağırlıkça %0.5, 1, 1.5 ve 2 oranlarında alüminyum oksit ilave edildi. Partiküllerin karışım içinde dağılması ve aglomerasyonun önlenmesi için partikül miktarının 5 katı MEG (mono etilen glikol) ilave edilmiş ve formülasyon ultrasonik mikserde 30 dakika karıştırılmıştır. %1,5 Al2O3 takviyeli kompozit malzemelerde çekme, % uzama, darbe, sertlik ve aşınma özellikleri iyileştirildi. Eğilme mukavemetinde bir azalma gözlendi.

Anahtar Kelimeler

Alüminyum oksit, Al2O3, Vinil ester, Kompozit malzemeler, Mekanik Özellikler

Effect of Al2O3 Particles on Mechanical Properties of Vinylester Composite Material

Öz

Vinyl ester resins are widely used as matrix materials in particle and fiber reinforced composites. Nowadays, particles are also preferred in micron-sized microstructures to increase the mechanical properties of polymer matrix composites. In this work, vinyl ester matrix composites reinforced with aluminum oxide particles of 1-3 micron dimensions were produced. Mechanical properties such as tensile, 3 point bending, hardness, impact and wear properties of specimens prepared were investigated. Teflon mold was preferred to production of samples. In the reaction 50% active methyl ethyl ketone peroxide as initiator and 6% cobalt naphthalate as accelerator were used. Aluminum oxide was added to the vinyl ester resin at 0.5, 1, 1.5 and 2 wt% ratios. In order to disperse the particles in the mixture and prevent agglomeration, MEG (mono ethylene glycol) was added 5 times the amount of particles and the formulation was mixed in an ultrasonic mixer for 30 minutes. Tensile, % elongation, impact, hardness and wear properties were improved in 1.5% Al2O3 reinforced composite materials. A decrease in flexural strength was observed.

Anahtar Kelimeler

Aluminum oxide, Al2O3, Vinyl ester, Composite materials, Mechanical Properties

Teşekkür

We would like to thank TURKOM CERA for giving Al2O3 particles for use in our study.

Kaynakça

• Chatterjee Amit and Muhammad S. Islam, Fabrication and characterization of TiO2–epoxy nanocomposites, Materials Science and Engineering A 487, 574–585. 2008.
• Lesley M. Hamming, Rui Qiao , Phillip B. Messersmith, L. Catherine Brinson, Effects of dispersion and interfacial modification on the macro scale properties of TiO2 polymer–matrix nanocomposites, Composites Science and Technology 69,1880–1886. 2009.
• Johnsen B.B., A.J. Kinloch, R.D. Mohammed, A.C. Taylor, S. Springer, Toughening mechanisms of nano particle-modified epoxy polymers, Polymer 48,530-541. 2007.
• Mirmohseni A. and S. Zavareh, Preparation and characterization of an epoxy nanocomposites toughened by a combination of thermoplastic, layered and particulate nano-fillers, Materials and Design 31, 2699–2706. 2010.
• Zhao Hongxia, Robert K.Y. Li, Effect of water absorption on the mechanical and dielectric properties of nano-alumina filled epoxy nanocomposites. Composites Part A 39, 602–611. 2008.
• Zhao Su, Linda S. Schadler, Renee Duncan , Henrik Hillborg , Tommaso Auletta, Mechanisms leading to improved mechanical performance in nanoscale alumina filled epoxy, Composites Science and Technology 68, 2965–2975. 2008.
• McGrath Laura M. , Richard S. Parnas , Saskia H. King , John L. Schroeder , Daniel A. Fischer , Joseph L. Lenhart, Investigation of the thermal, mechanical, and fracture properties of alumina epoxy composites, Polymer 49, 999-1014. 2008.
• Kardar P. , M. Ebrahimi , S. Bastani, Study the effect of nano-alumina particles on physical–mechanical properties of UV cured epoxy acrylate via nano-indentation, Progress in Organic Coatings 62, 321–325. 2008.
• Ahmad Farrah Noor, Mariatti Jaafar , Samayamutthirian Palaniandy, Khairun Azizi and Mohd Azizli, Effect of particle shape of silica mineral on the properties of epoxy composites. Composites Science and Technology 68, 346–353. 2008.
• Zhou Yuanxin , Evert White, Mahesh Hosur, Shaik Jeelani, Effect of particle size and weight fraction on the flexural strength and failure mode of TiO2 particles reinforced epoxy, Materials Letters 64, 806–809. 2010.
• Siddhartha, Amar Patnaik , Amba D. Bhatt, Mechanical and dry sliding wear characterization of epoxy–TiO2 particulate filled functionally graded composites materials using Taguchi design of experiment, Materials and Design 32, 615–627. 2011.
• Mallick P. Fiber-reinforced composites: materials, manufacturing and design. Boca Raton: CRC press, 2007.
• Kartal İ, Boztoprak Y.; Bor nitrür partikülleriyle takviye edilmiş vinil ester matrisli kompozitlerin mekanik özelliklerinin incelenmesi, El-Cezerî Fen ve Mühendislik Dergisi Cilt: 6, No: 1, 43-50, 2019.