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Mechanical properties and creep behavior of fluoroelastomer under hydrochloric acid environments

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Abstract

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.

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Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. 51573098), the Innovative Group of Liaoning Education Department of China (LT2016013) and the Program for Young and Middle-aged Scientific and Technological Innovative Talents of Shenyang, China (No. RC180154).

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Authors and Affiliations

  1. College of Materials Science and Engineering, Shenyang University of Chemical Technology, Shenyang, 110142, China

    Wenchi Han, Hongyang Du, Shize Li, Hanlan Kang & Qinghong Fang

  2. Liaoning Provincial Key Laboratory of Rubber & Elastomer, Shenyang, 110142, China

    Wenchi Han, Hanlan Kang & Qinghong Fang

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  1. Wenchi Han
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  2. Hongyang Du
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  3. Shize Li
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Correspondence to Qinghong Fang.

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Han, W., Du, H., Li, S. et al. Mechanical properties and creep behavior of fluoroelastomer under hydrochloric acid environments. Polym. Bull. 77, 5967–5983 (2020). https://doi.org/10.1007/s00289-019-03061-x

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  • DOI: https://doi.org/10.1007/s00289-019-03061-x

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