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An investigation into polymeric materials for the design of high performances shock tubes
Author(s)
Yakan-A-Nwai, Christian
Date Issued
2011
Type
Thesis
Publisher
Cape Peninsula University of Technology
Abstract
Shock tube initiators are small-diameter hollow plastic tubing used in blasting systems to
remotely convey an initiation signal in the form of shock wave to a detonating cap. Over the past
years, few researchers have reported the development of various shock tube designs consisting
of single, double, and triple polymeric layers. Despite the disclosure of the development of
different shock tube designs, none of the researchers presented experimental data enabling one
to predict how shock tubes' properties and performance could be affected by the number of
polymeric layers and the nature of polymeric materials present in the shock tube. The aim of this
investigation was, therefore, to experimentally determine to which extent changing the number of
polymeric layers and the type of polymeric materials could vary the properties and performance
of a multi-layered shock tube.
The methodology used during the investigation involved the extrusion and testing of a standard
three-layered shock tube similar to the commercially available high performance shock tube and
samples of different recipes of two-layered shock tubes. The three-layered shock tube was
made of high density polyethylene in the outer layer, ethylene based ionomer in the inner layer
and ethylene acrylic acid copolymer in the intermediate layer. Samples of two-layered shock
tubes were made of ethylene based ionomer in the inner layer and various blends of
polyethylene/Adhesion promoter in the outer layer.
remotely convey an initiation signal in the form of shock wave to a detonating cap. Over the past
years, few researchers have reported the development of various shock tube designs consisting
of single, double, and triple polymeric layers. Despite the disclosure of the development of
different shock tube designs, none of the researchers presented experimental data enabling one
to predict how shock tubes' properties and performance could be affected by the number of
polymeric layers and the nature of polymeric materials present in the shock tube. The aim of this
investigation was, therefore, to experimentally determine to which extent changing the number of
polymeric layers and the type of polymeric materials could vary the properties and performance
of a multi-layered shock tube.
The methodology used during the investigation involved the extrusion and testing of a standard
three-layered shock tube similar to the commercially available high performance shock tube and
samples of different recipes of two-layered shock tubes. The three-layered shock tube was
made of high density polyethylene in the outer layer, ethylene based ionomer in the inner layer
and ethylene acrylic acid copolymer in the intermediate layer. Samples of two-layered shock
tubes were made of ethylene based ionomer in the inner layer and various blends of
polyethylene/Adhesion promoter in the outer layer.
Additional information
Thesis (MTech (Chemical Engineering))--Cape Peninsula University of Technology, 2011.
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20130088_Yakan-A-Nwai_C_Mtech_Chem_Eng_2011_20130088.pdf
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