Relation between life time, failure stress and craze microstructure in polyethylene as evidenced by fracture surface texture analysis after an accelerated Full-Notch Creep Test
| Autor: | Mark Johannes Boerakker, R. Deblieck, Arno Wilbers, Britta Gerets, Tine Boonen, Harm Caelers |
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| Rok vydání: | 2019 |
| Předmět: |
Materials science
Polymers and Plastics Organic Chemistry Life time 02 engineering and technology Surface finish Strain hardening exponent Polyethylene 010402 general chemistry 021001 nanoscience & nanotechnology Microstructure 01 natural sciences 0104 chemical sciences Stress (mechanics) chemistry.chemical_compound Creep chemistry Materials Chemistry Fracture (geology) Composite material 0210 nano-technology |
| Zdroj: | Polymer. 176:264-273 |
| ISSN: | 0032-3861 |
| DOI: | 10.1016/j.polymer.2019.04.033 |
| Popis: | A set of five polyethylenes, of which four have 1-butene as co-monomer and one has 1-hexene as co-monomer was evaluated to determine their respective strain hardening values at 80 °C and to determine their failure times applying an accelerated Full-Notch Creep Test at 90 °C with loads varying between 1 and 6 MPa using Lauramine Oxide as detergent in an aqueous solution. The resulting failure times, fracture surface analysis and strain hardening values were described using the Kramer-Berger theory for craze propagation and the Paris-Erdogan phenomenological description of crack growth. From this exercise it is clearly demonstrated that the experimental findings are in line with the Kramer-Berger model. Hence, the viability and validity of these tests for probing the slow crack growth performance of polyethylene grades was shown. |
| Databáze: | OpenAIRE |
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