Experiments and modeling of the viscoelastic behavior of polymeric gels
Experiments and modeling of the viscoelastic behavior of polymeric gels
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DOI：
10.1016/j.jmps.2019.103829
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发表时间：
2020-04
影响因子：
5.3
通讯作者：
Nikola Bosnjak;S. Nadimpalli;D. Okumura;Shawn A. Chester
中科院分区：
文献类型：
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作者：
Nikola Bosnjak;S. Nadimpalli;D. Okumura;Shawn A. Chester
聚合物凝胶是用溶剂溶胀的交联聚合物网络。而且，众所周知，许多聚合物材料在其机械响应中表现出粘弹性行为。在这项工作中，我们报告了我们最近的实验观察和理论建模涉及的变化的粘弹性响应的聚合物材料VHB在多种溶剂中的平衡溶胀所造成的。为了表征这种变化，我们开发了一种实验程序，包括原始、自由溶胀时的机械测试、溶胀时的机械测试和干燥后的机械测试。一个模型被用来帮助解释实验结果。这项工作的关键发现是，我们的研究结果表明，最初干燥的VHB的粘弹性行为，可逆地，变得基本上超弹性时，在多种溶剂中溶胀到平衡。
A polymeric gel is a cross-linked polymer network swollen with a solvent. Also, as is well known many polymeric materials exhibit viscoelastic behavior in their mechanical response. In this work, we report on our recent experimental observations and theoretical modeling involving the change in the viscoelastic response of the polymeric material VHB caused by equilibrium swelling in multiple solvents. To characterize this change, we have developed an experimental procedure that includes mechanical testing when virgin, free swelling, mechanical testing when swollen, and mechanical testing after drying. A model is used to help interpret the experimental results. The key finding of this work is that our results indicate that the viscoelastic behavior of initially dry VHB, reversibly, becomes essentially hyperelastic when swollen to equilibrium in multiple solvents.