UV Effects on the Tensile and Creep Behaviour of HDPE
| Autor: | A F C Becerra, J. R. M. d'Almeida |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Materials science
Polymers and Plastics 02 engineering and technology Polyethylene 021001 nanoscience & nanotechnology chemistry.chemical_compound 020401 chemical engineering Creep Creep stress chemistry Ultimate tensile strength Materials Chemistry Ceramics and Composites High-density polyethylene 0204 chemical engineering Composite material 0210 nano-technology |
| Zdroj: | Polymers and Polymer Composites. 25:327-332 |
| ISSN: | 1478-2391 0967-3911 |
| Popis: | The tensile and creep behaviour of a high-density polyethylene grade used to manufacture pipes were evaluated as a function of the time of exposure to UV radiation. The effect of the creep stress level was also analysed. A threshold radiation dose was determined, above which UV radiation causes loss of the macroscopic mechanical behaviour for this particular HDPE grade. Below the threshold value, macromolecular modifications were also taking place, but the deleterious effect of UV radiation was masked by the development of a more rigid structure. Scanning electron microscopy, melt flow index and thermogravimetric analysis were used to support the results of the mechanical analysis. |
| Databáze: | OpenAIRE |
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