Effect of weathering-induced degradation on the fracture and fatigue characteristics of injection-molded polypropylene/talc composites
| Autor: | Byoung Ho Choi, Ji Hoon Hwang, Min Seok Choi, Hong Chul Hyun, Jung Wook Wee |
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| Rok vydání: | 2018 |
| Předmět: |
Materials science
Weathering 02 engineering and technology 010402 general chemistry Talc 01 natural sciences Industrial and Manufacturing Engineering chemistry.chemical_compound Polymer degradation Ultimate tensile strength medicine General Materials Science Composite material Elastic modulus Polypropylene Mechanical Engineering 021001 nanoscience & nanotechnology 0104 chemical sciences chemistry Mechanics of Materials Modeling and Simulation Fracture (geology) population characteristics Degradation (geology) 0210 nano-technology geographic locations medicine.drug |
| Zdroj: | International Journal of Fatigue. 117:111-120 |
| ISSN: | 0142-1123 |
| Popis: | Weathering-induced degradation causes a premature failure of polymeric materials in outdoor applications. In this study, the polypropylene and talc composites were degraded by accelerated and outdoor weathering. By comparing the degradation degree through the Fourier Transform-Infrared (FT-IR) analysis, the accelerated weathering factor was constructed. To investigate the effect of weathering on the short and long-term mechanical properties, the tensile, essential work of fracture, and fatigue tests were performed for pre-degraded specimens under accelerated weathering. The results demonstrated that the weathering-induced degradation slightly increased the elastic modulus and tensile strength; whereas such degradation dramatically reduced the strain at the break. The fracture characteristics in plane stress conditions and stress-lifetime curves with pre-weathering were also investigated. Finally, a new model predicting the lifetime under the simultaneous application of fatigue loading and weathering-induced degradation was developed by modifying the well-known Miner’s rule. |
| Databáze: | OpenAIRE |
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