Enhancement of performance characteristics of epoxy adhesives through particle reinforcement

Download

index.pdf

Date

2019

Author

Yetgin, Hasan

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

144
views

80
downloads

Epoxy adhesives are common bonding agents used to join dissimilar materials. They are widely preferred in aerospace industry. But, their lack of performance at extremities of service temperatures limits their use in practical applications. The aim of this study is to improve the epoxy adhesives’ thermal properties through addition of filler particles, i.e. boron nitride, aluminum oxide, titanium oxide and Au doped titanium oxide. The last one has been developed specifically for this study to enhance the drawbacks of titanium particles in thermal conductivity. In order to have regular samples, a sample preparation method has been suggested. Then, the samples were tested by Dynamic Mechanical Analysis (DMA), Differential Scanning Calorimetry (DSC), Scanning Electron Microscopy (SEM), Thermal Conductivity Measurement, Fourier Transform Infrared Spectroscopy (FTIR) and Single Lap Shear Test. The results showed that adding filler materials had favorable influence on thermal and mechanical performance. For the key parameters of thermal and mechanical performance of adhesives, boron nitride particles had greatest influence on the thermal conductivity. Moreover, Au doped and regular titanium dioxide particles had brilliant results in glass transition temperature. Adhesion strength was enhanced mostly by aluminum dioxide particles. The result of scanning methods validated the suggested sample preparation method. Finally, while Au doped titanium oxide particles enhanced the glass transition temperature, the expected improvement on thermal conductivity value has not been reached

Subject Keywords

Aerospace industries., Keywords: Epoxy Reinforcement, Aerospace Industry, Particle Addition

URI

http://etd.lib.metu.edu.tr/upload/12625085/index.pdf
https://hdl.handle.net/11511/45213

Collections

Graduate School of Natural and Applied Sciences, Thesis

Suggestions

OpenMETU
Core

Enhancing thermal conductivity of epoxy with a binary filler system of h-BN platelets and Al2O3 nanoparticles Yetgin, Hasan; Veziroglu, Salih; Aktas, Oral Cenk; Yalçınkaya, Tuncay (Elsevier BV, 2020-04-01) Epoxy resin is a common adhesive bonding material used to join dissimilar materials, especially in the electronics and aerospace industries. However, its low thermal conductivity and high coefficient of thermal expansion limit the direct use of epoxy in practical applications. In order to improve thermo-mechanical properties, we have prepared a series of epoxy composites using a binary system of hexagonal-boron nitride (h-BN) and aluminum oxide (Al2O3) fillers and analyzed the effect of the ratio of these f...
Enhancement of Physical and Mechanical Properties of Epoxy Resins by Graphene/Graphene Oxide Additives Budak, Deniz; Yıldırım, Erol; Department of Polymer Science and Technology (2022-1-23) Control of interfacial interactions is essential for the preparation of polymer matrix composites with enhanced physical, mechanical, thermal and electrical properties. The performance of the graphene and graphene oxide (GO) additives can be improved by achieving strong adhesion and uniform dispersion of GO in the epoxy matrix. In this study, modeling and simulation of DGEBA (Bisphenol A diglycidyl ether)/DETA (Diethylenetriamine) based epoxy nanocomposites containing graphene and graphene oxide (GO) additi...
Modification of water vapour transfer rate of low density polyethylene films for food packaging Dirim, Safiye Nur; Özden, Özlem; Bayındırlı, Alev; Esin, Ali (Elsevier BV, 2004-06-01) One of the most common materials used for packaging is low density polyethylene film. To improve the water vapour transfer of the film, zeolite-polymer composite films and perforated films are produced. The solid-low density polyethylene composite films were prepared by extrusion of polyethylene beads coated with hot zeolite particles of a definite size range in an industrial extruder (-420/+212 -212/+106 -106/+53 muparticles/g of polyethylene beads). A needle (0.2, 0.5 and 1.75 mm in diameter) attached to ...
Reinforcement of epoxies by boron minerals Babuçcuoğlu, Yurdaer; Tinçer, Teoman; Özdemir, Tonguç; Department of Polymer Science and Technology (2015) As polymers/fillers have shown much improved mechanical and thermal properties, the subject of epoxy resin reinforcement using boron minerals fillers has become valuable subject to study. The aim of this study is how boron minerals influence epoxy resins’ mechanical and thermal properties under gamma irradiation. The effects of boron on the mechanical and thermal properties of epoxy were studied in terms of mineral type, mineral loading concentration and irradiation dose in air and under vacuum. Bisphenol-A...
Enhancement of mechanical properties of co-doped hydroxyapatite coatings on pre-treated Ti6Al4V Hacıoğlu, Tuğçe; Evis, Zafer; Tezcaner, Ayşen (2017-10-27) Titanium and its alloys are commonly preferred implant materials for hard tissue applications. Today more than 4.4 million people have an internal fixation device and over 1.3 million people possess an artificial joint. Not only is there high demand for orthopedic surgeries for new patients every year, but there is also an even higher demand for patients who must receive revision surgeries. In order to enhance the properties of titanium based implant materials, different pretreatment and coating techniques ...

Citation Formats

H. Yetgin, “Enhancement of performance characteristics of epoxy adhesives through particle reinforcement,” Thesis (M.S.) -- Graduate School of Natural and Applied Sciences. Aerospace Engineering., Middle East Technical University, 2019.