Development of high shrinkage polyethylene terephthalate (PET) shape memory polymer tendons for concrete crack closure
| Autor: | Anthony Duncan Jefferson, Glen Thompson, Oliver Teall, Diane Ruth Gardner, John Sweeney, Robert John Lark, Tim Gough, Martins Pilegis |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Materials science
02 engineering and technology 010402 general chemistry 01 natural sciences Stress (mechanics) Crack closure chemistry.chemical_compound Polyethylene terephthalate General Materials Science Experimental work Electrical and Electronic Engineering Composite material Civil and Structural Engineering Shrinkage 021001 nanoscience & nanotechnology Condensed Matter Physics Atomic and Molecular Physics and Optics 0104 chemical sciences Shape-memory polymer chemistry TA Mechanics of Materials Signal Processing Activation temperature Extrusion 0210 nano-technology |
| ISSN: | 0964-1726 |
| Popis: | The shrinkage force exerted by restrained shape memory polymers can potentially be used to close cracks in structural concrete. This paper describes the physical processing and experimental work undertaken to develop high shrinkage die-drawn Polyethylene Terephthalate (PET) shape memory polymer tendons for use within a crack closure system. The extrusion and die-drawing procedure used to manufacture a series of PET tendon samples is described. The results from a set of restrained shrinkage tests, undertaken at differing activation temperatures, are also presented along with the mechanical properties of the most promising samples. The stress developed within the tendons is found to be related to the activation temperature, the cross-sectional area and to the draw rate used during manufacture. Comparisons with commercially-available PET strip samples used in previous research are made, demonstrating an increase in restrained shrinkage stress by a factor of two for manufactured PET filament samples. |
| Databáze: | OpenAIRE |
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