Compressive Properties And Simulation Of Low Density Polyethylene Foams

This research was conducted to study the compression properties and simulation of low density polyethylene foam. Samples compounding was done using thermostatically controlled heated two roll mill and foamed using a compression moulding via a single stage foaming process at 175°C. The compounds were...

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Main Author:	Zakaria, Zunaida
Format:	Thesis
Language:	English
Published:	2013
Subjects:	TN1-997 Mining engineering Metallurgy
Online Access:	http://eprints.usm.my/45235/1/Zunaida%20Binti%20Zakaria24.pdf
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id	my-usm-ep.45235
record_format	uketd_dc
spelling	my-usm-ep.452352019-08-09T07:50:04Z Compressive Properties And Simulation Of Low Density Polyethylene Foams 2013-07 Zakaria, Zunaida TN1-997 Mining engineering. Metallurgy This research was conducted to study the compression properties and simulation of low density polyethylene foam. Samples compounding was done using thermostatically controlled heated two roll mill and foamed using a compression moulding via a single stage foaming process at 175°C. The compounds were prepared by changing dicumyl peroxide (DCP) concentration (i.e. 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75 and 2.0 phr) to evaluate its effect on structure and mechanical properties. The prepared samples were characterized through density, cell morphology (i.e. cell size and cell wall thickness) and compression test. It was observed that the relative density increased with increasing DCP concentration and this subsequently decrease the cell size and increase the cell wall thickness. In compression test, results indicated that the elastic modulus increased with increasing DCP concentration. The compression deformation mechanisms were implemented by capturing the image and recording the real-time changes during compression test. The localized bending and buckling of the cell walls in elastic region, cells collapse in densification region and shear band were observed in the foam. The shear band with high density region was discovered in perpendicular to loading direction and it was contributed by cells collapse. The modelling and simulation part were successfully performed using SolidWorks software package. For models that were constructed with the assistance of experimental results, the larger cell model experienced high displacement and low von Mises stress. 2013-07 Thesis http://eprints.usm.my/45235/ http://eprints.usm.my/45235/1/Zunaida%20Binti%20Zakaria24.pdf application/pdf en public phd doctoral Universiti Sains Malaysia Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral
institution	Universiti Sains Malaysia
collection	USM Institutional Repository
language	English
topic	TN1-997 Mining engineering Metallurgy
spellingShingle	TN1-997 Mining engineering Metallurgy Zakaria, Zunaida Compressive Properties And Simulation Of Low Density Polyethylene Foams
description	This research was conducted to study the compression properties and simulation of low density polyethylene foam. Samples compounding was done using thermostatically controlled heated two roll mill and foamed using a compression moulding via a single stage foaming process at 175°C. The compounds were prepared by changing dicumyl peroxide (DCP) concentration (i.e. 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 1.75 and 2.0 phr) to evaluate its effect on structure and mechanical properties. The prepared samples were characterized through density, cell morphology (i.e. cell size and cell wall thickness) and compression test. It was observed that the relative density increased with increasing DCP concentration and this subsequently decrease the cell size and increase the cell wall thickness. In compression test, results indicated that the elastic modulus increased with increasing DCP concentration. The compression deformation mechanisms were implemented by capturing the image and recording the real-time changes during compression test. The localized bending and buckling of the cell walls in elastic region, cells collapse in densification region and shear band were observed in the foam. The shear band with high density region was discovered in perpendicular to loading direction and it was contributed by cells collapse. The modelling and simulation part were successfully performed using SolidWorks software package. For models that were constructed with the assistance of experimental results, the larger cell model experienced high displacement and low von Mises stress.
format	Thesis
qualification_name	Doctor of Philosophy (PhD.)
qualification_level	Doctorate
author	Zakaria, Zunaida
author_facet	Zakaria, Zunaida
author_sort	Zakaria, Zunaida
title	Compressive Properties And Simulation Of Low Density Polyethylene Foams
title_short	Compressive Properties And Simulation Of Low Density Polyethylene Foams
title_full	Compressive Properties And Simulation Of Low Density Polyethylene Foams
title_fullStr	Compressive Properties And Simulation Of Low Density Polyethylene Foams
title_full_unstemmed	Compressive Properties And Simulation Of Low Density Polyethylene Foams
title_sort	compressive properties and simulation of low density polyethylene foams
granting_institution	Universiti Sains Malaysia
granting_department	Pusat Pengajian Kejuruteraan Bahan & Sumber Mineral
publishDate	2013
url	http://eprints.usm.my/45235/1/Zunaida%20Binti%20Zakaria24.pdf
_version_	1747821474684600320

Compressive Properties And Simulation Of Low Density Polyethylene Foams

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