Tensile properties of styrene-ethylene-butadiene-styrene toughened and glass fiber reinforced polyethylene

Polyethylene composites reinforced with glass fibers and elastomer-toughened with styrene-ethylene-butadiene-styrene were prepared using extrusion and then compression molded to form tensile bars conforming to the ASTM D-638 testing standards. Varying amounts of glass fibers and SEBS elastomers were...

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Main Author: Wong, Ngiap Han.
Other Authors: Tan Lay Poh
Format: Final Year Project
Language:English
Published: 2010
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Online Access:http://hdl.handle.net/10356/38599
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-385992023-03-04T15:34:12Z Tensile properties of styrene-ethylene-butadiene-styrene toughened and glass fiber reinforced polyethylene Wong, Ngiap Han. Tan Lay Poh School of Materials Science and Engineering DRNTU::Engineering Polyethylene composites reinforced with glass fibers and elastomer-toughened with styrene-ethylene-butadiene-styrene were prepared using extrusion and then compression molded to form tensile bars conforming to the ASTM D-638 testing standards. Varying amounts of glass fibers and SEBS elastomers were incorporated into the sample in order to determine its effect on the tensile properties of the composites. Through the test results, it was revealed that strengthening and toughening of the polyethylene composites were not achieved. Instead of increasing yield strength with increasing glass fiber contents, reductions in yield strength of the samples and presence of voids were observed. The main reason for this surprising discovery is due to the poor interfacial adhesion between the fiber-matrix interfaces, whose main purpose is to transmit stresses from the weak matrix to the stronger fiber. The reasons for the unusual trends in tensile properties of the composites are discussed in detail in this report. In addition, it was discovered that 5 wt% SEBS actually caused the composite to fracture at low elongation at break values. However, at 10 wt% SEBS, there was a slight improvement in elongation compared to the corresponding non-elastomer-toughened sample. Under the SEM, it was discovered that there was no distinct 2 phase core shell structure, which is necessary for the toughening of polymers. Hence, it can be argued that higher amounts of SEBS are required to achieve a toughening effect. Bachelor of Engineering (Materials Engineering) 2010-05-13T00:59:53Z 2010-05-13T00:59:53Z 2010 2010 Final Year Project (FYP) http://hdl.handle.net/10356/38599 en Nanyang Technological University 53 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
spellingShingle DRNTU::Engineering
Wong, Ngiap Han.
Tensile properties of styrene-ethylene-butadiene-styrene toughened and glass fiber reinforced polyethylene
description Polyethylene composites reinforced with glass fibers and elastomer-toughened with styrene-ethylene-butadiene-styrene were prepared using extrusion and then compression molded to form tensile bars conforming to the ASTM D-638 testing standards. Varying amounts of glass fibers and SEBS elastomers were incorporated into the sample in order to determine its effect on the tensile properties of the composites. Through the test results, it was revealed that strengthening and toughening of the polyethylene composites were not achieved. Instead of increasing yield strength with increasing glass fiber contents, reductions in yield strength of the samples and presence of voids were observed. The main reason for this surprising discovery is due to the poor interfacial adhesion between the fiber-matrix interfaces, whose main purpose is to transmit stresses from the weak matrix to the stronger fiber. The reasons for the unusual trends in tensile properties of the composites are discussed in detail in this report. In addition, it was discovered that 5 wt% SEBS actually caused the composite to fracture at low elongation at break values. However, at 10 wt% SEBS, there was a slight improvement in elongation compared to the corresponding non-elastomer-toughened sample. Under the SEM, it was discovered that there was no distinct 2 phase core shell structure, which is necessary for the toughening of polymers. Hence, it can be argued that higher amounts of SEBS are required to achieve a toughening effect.
author2 Tan Lay Poh
author_facet Tan Lay Poh
Wong, Ngiap Han.
format Final Year Project
author Wong, Ngiap Han.
author_sort Wong, Ngiap Han.
title Tensile properties of styrene-ethylene-butadiene-styrene toughened and glass fiber reinforced polyethylene
title_short Tensile properties of styrene-ethylene-butadiene-styrene toughened and glass fiber reinforced polyethylene
title_full Tensile properties of styrene-ethylene-butadiene-styrene toughened and glass fiber reinforced polyethylene
title_fullStr Tensile properties of styrene-ethylene-butadiene-styrene toughened and glass fiber reinforced polyethylene
title_full_unstemmed Tensile properties of styrene-ethylene-butadiene-styrene toughened and glass fiber reinforced polyethylene
title_sort tensile properties of styrene-ethylene-butadiene-styrene toughened and glass fiber reinforced polyethylene
publishDate 2010
url http://hdl.handle.net/10356/38599
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