Lap shear strength of nanofillers modified epoxy adhensives

Epoxy adhesives are very versatile and have a wide range of applications. These include coatings, adhesives and composite materials. Due to the unique chemistry of epoxies and the range of existing variations available in the market, epoxies with a broad range of properties can be readily synthesize...

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Main Author: Poon, Yvette Qi Ying.
Other Authors: School of Mechanical and Aerospace Engineering
Format: Final Year Project
Language:English
Published: 2011
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Online Access:http://hdl.handle.net/10356/46131
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-461312023-03-04T18:45:35Z Lap shear strength of nanofillers modified epoxy adhensives Poon, Yvette Qi Ying. School of Mechanical and Aerospace Engineering Yang Jinglei DRNTU::Engineering::Materials::Nanostructured materials Epoxy adhesives are very versatile and have a wide range of applications. These include coatings, adhesives and composite materials. Due to the unique chemistry of epoxies and the range of existing variations available in the market, epoxies with a broad range of properties can be readily synthesized. As such, epoxies are known for their excellent adhesion, chemical and heat resistance and good mechanical properties, they are very much favored for aerospace applications. However, epoxy adhesives have low lap shear strength at elevated temperatures. As such, nanoparticles are dispersed into epoxy adhesives to improve their lap shear strength. This project aims to further understand the effects that diluting different percentages of silica nanoparticles into epoxy adhesives will have on their mechanical single – lap shear strength. In this project, silica nanoparticles with an average diameter of 20nm were used and it was found that the optimal filler content is 0.5 wt%. Other factors such as the thickness of the epoxy adhesive, type of pretreatment used and also the strain rate during testing were studied. It was found that using a thinner layer of epoxy adhesive generally gave rise to higher lap shear stress. Two different types of pretreatment was used; BR 127 Corrosion Inhibiting Primer and (3-Glycidyloxypropyl) trimethoxysilane. It was found that using BR 127 Primer allows higher lap shear stress as compared to using (3-Glycidyloxypropyl) trimethoxysilane. In addition, a general trend exists whereby the mechanical strength of the single – lap shear strength increases as the loading speed increases. Bachelor of Engineering (Aerospace Engineering) 2011-06-29T04:11:13Z 2011-06-29T04:11:13Z 2011 2011 Final Year Project (FYP) http://hdl.handle.net/10356/46131 en Nanyang Technological University 61 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Materials::Nanostructured materials
spellingShingle DRNTU::Engineering::Materials::Nanostructured materials
Poon, Yvette Qi Ying.
Lap shear strength of nanofillers modified epoxy adhensives
description Epoxy adhesives are very versatile and have a wide range of applications. These include coatings, adhesives and composite materials. Due to the unique chemistry of epoxies and the range of existing variations available in the market, epoxies with a broad range of properties can be readily synthesized. As such, epoxies are known for their excellent adhesion, chemical and heat resistance and good mechanical properties, they are very much favored for aerospace applications. However, epoxy adhesives have low lap shear strength at elevated temperatures. As such, nanoparticles are dispersed into epoxy adhesives to improve their lap shear strength. This project aims to further understand the effects that diluting different percentages of silica nanoparticles into epoxy adhesives will have on their mechanical single – lap shear strength. In this project, silica nanoparticles with an average diameter of 20nm were used and it was found that the optimal filler content is 0.5 wt%. Other factors such as the thickness of the epoxy adhesive, type of pretreatment used and also the strain rate during testing were studied. It was found that using a thinner layer of epoxy adhesive generally gave rise to higher lap shear stress. Two different types of pretreatment was used; BR 127 Corrosion Inhibiting Primer and (3-Glycidyloxypropyl) trimethoxysilane. It was found that using BR 127 Primer allows higher lap shear stress as compared to using (3-Glycidyloxypropyl) trimethoxysilane. In addition, a general trend exists whereby the mechanical strength of the single – lap shear strength increases as the loading speed increases.
author2 School of Mechanical and Aerospace Engineering
author_facet School of Mechanical and Aerospace Engineering
Poon, Yvette Qi Ying.
format Final Year Project
author Poon, Yvette Qi Ying.
author_sort Poon, Yvette Qi Ying.
title Lap shear strength of nanofillers modified epoxy adhensives
title_short Lap shear strength of nanofillers modified epoxy adhensives
title_full Lap shear strength of nanofillers modified epoxy adhensives
title_fullStr Lap shear strength of nanofillers modified epoxy adhensives
title_full_unstemmed Lap shear strength of nanofillers modified epoxy adhensives
title_sort lap shear strength of nanofillers modified epoxy adhensives
publishDate 2011
url http://hdl.handle.net/10356/46131
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