How double dynamics affects the large deformation and fracture behaviors of soft materials
How double dynamics affects the large deformation and fracture behaviors of soft materials
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DOI：
10.1122/8.0000438
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发表时间：
2022-11-01
影响因子：
3.3
通讯作者：
Gong, Jian Ping
中科院分区：
文献类型：
--
作者：
Cui, Kunpeng;Gong, Jian Ping
在过去的二十年中，由于工程和生物相关领域的高新技术应用，已经开发了许多机械强度和坚韧的软材料，包括聚合物网络。这些材料的特点是其动态的复杂性和大变形行为。在这篇综述中，我们专注于链动力学如何影响软材料的大变形和断裂行为。为了帮助没有流变学背景的读者，我们首先回顾了几个简单网络的线性流变学行为。我们表明，通过发挥物理纠缠，化学交联和物理协会的建筑聚合物，可以获得一个非常丰富的面板的动态响应。然后，我们展示了链动力学如何影响具有化学交联剂和物理键的双重交联水凝胶的变形和断裂行为的例子。我们还提供了由三嵌段聚合物制成的物理双网络凝胶的独特变形行为的例子。此后，链动力学的裂纹萌生和扩展行为的影响的例子。我们发现，即使是化学交联的双网络水凝胶，在一个共同的变形窗口中表现出弹性行为，链动力学影响裂纹尖端的损伤区的大小。最后，我们通过提出未来研究的几个方向来总结这篇综述。(C)2022流变学学会。
Numerous mechanically strong and tough soft materials comprising of polymer networks have been developed over the last two decades, motivated by new high-tech applications in engineering and bio-related fields. These materials are characterized by their dynamic complexities and large deformation behaviors. In this Review, we focus on how chain dynamics affects the large deformation and fracture behaviors of soft materials. To favor readers without a rheology background, first we review the linear rheology behaviors of several simple networks. We show that, by playing with the physical entanglement, chemical cross-linking, and physical association of the building polymers, a very rich panel of dynamic responses can be obtained. Then, we show examples of how chain dynamics affects the deformation and fracture behaviors of dually cross-linked hydrogels having chemical cross-linkers and physical bonds. We also provide examples on the unique deformation behavior of physical double-network gels made from triblock polymers. Thereafter, examples of the influence of chain dynamics on the crack initiation and growth behaviors are presented. We show that even for chemically cross-linked double-network hydrogels that exhibit elastic behaviors in a common deformation window, the chain dynamics influences the damage zone size at the crack tip. Finally, we conclude this Review by proposing several directions for future research. (C) 2022 The Society of Rheology.