Structural Elucidation and Mechanical Behavior of Cryogenically Treated Ultra-High Molecular Weight Poly-ethylene (UHMWPE)
| Autor: | Alekhya Phani Konda, Neha V. Patil, Kavita A. Deshmukh, Sidhdant R. Rakhe, Pierpaolo Carlone, Arabelli Anjali, Raju V. Sontakke, Mitali V. Somvanshi, Saisha Batthula, Gauri Waghmare, Dilip Peshwe, Swamini Chopra, C. L. Gogte |
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| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
010302 applied physics
chemistry.chemical_classification Materials science 0211 other engineering and technologies chemistry.chemical_element Izod impact strength test 02 engineering and technology Polymer Wear performance Impact strength 01 natural sciences Crystallinity chemistry Cryogenic treatment Structural integrity Ultra-high molecular weight poly-ethylene (UHMWPE) 0103 physical sciences Fourier transform infrared spectroscopy Composite material Cryogenic temperature Carbon 021102 mining & metallurgy Poly ethylene |
| Popis: | The present work discusses the enhancement of mechanical properties, namely wear and impact resistance, of ultra-high molecular weight poly-ethylene (UHMWPE), exposed to cryogenic treatment under different conditions. The cryogenic temperature was found to play a vital role in the structure and properties of UHMWPE, whereas − 140 °C for a soaking period of 12 h was found to enhance the specific wear rate by 48% and 35% in dry and lubricated condition, respectively, while the impact strength increased by 175%, without hampering its structural stability. This finding contradicts the popular belief that a minimum 24 h of cryo-treatment at − 185 °C is essential to bring out the necessary changes in any polymer. Conversely, cryogenically treating the polymer at − 185 °C weakens and deteriorates the material, while lower temperature (− 80 °C) demonstrates to be insufficient to induce the desired cryo-structural modifications. The FTIR and XRD analysis revealed that the mechanical properties enhancement in UHMWPE is credited to the cryo-structural rearrangement of highly dense carbon backbone, which in turn reduces the inter-chain distance and brings the adjacent crystalline segments closer to each other, thereby increasing the crystallinity as well. |
| Databáze: | OpenAIRE |
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