Mechanical properties and creep behavior of fluoroelastomer under hydrochloric acid environments
Autor: | Shize Li, Qinghong Fang, Hongyang Du, Hanlan Kang, Wenchi Han |
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Rok vydání: | 2019 |
Předmět: |
Materials science
Polymers and Plastics Gasket technology industry and agriculture 02 engineering and technology General Chemistry 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics complex mixtures 01 natural sciences Viscoelasticity 0104 chemical sciences body regions Creep Natural rubber visual_art Ultimate tensile strength Materials Chemistry visual_art.visual_art_medium Fluoroelastomer Deformation (engineering) Composite material 0210 nano-technology Tensile testing |
Zdroj: | Polymer Bulletin. 77:5967-5983 |
ISSN: | 1436-2449 0170-0839 |
Popis: | Fluoroelastomers are commonly used as seal, gasket or membrane materials in many industrial applications. The temperature- and environment-dependent material property of rubbers will result in degradation and creep. In this study, the effects of both temperature and concentration of hydrochloric acid solution on mechanical properties and creep behavior of fluoroelastomer are investigated. The tensile test results demonstrate that the mechanical properties of rubber after acid treatment show a continual decrease as temperature or concentration increased. This degradation is attributed to the combination of both the swelling of rubber for the matrix which is penetrated by a number of acid solution molecules and the damage of chain networks where the acid–rubber reactions are generated inside. The tensile creep of the acid-treated rubbers is examined under controlled acidic environmental conditions. The creep rate and creep strain are both increased with increasing temperature or concentration. The creep curves are correctly fitted at long times by standard four-element model to evaluate the contributions from separate creep components. From fitting results, the change of viscoelastic strain component and viscous strain component suggests there are structural rearrangements within rubber chains and deformation of rubber matrix. |
Databáze: | OpenAIRE |
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