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Experimental Investigation and Modeling of the Dynamic Resistance Response of Carbon Particle‐Filled Polymers
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-08-16 , DOI: 10.1002/mame.202000361 Johannes Mersch 1 , Hans Winger 2 , Andreas Nocke 2 , Chokri Cherif 2 , Gerald Gerlach 1
Macromolecular Materials and Engineering ( IF 4.2 ) Pub Date : 2020-08-16 , DOI: 10.1002/mame.202000361 Johannes Mersch 1 , Hans Winger 2 , Andreas Nocke 2 , Chokri Cherif 2 , Gerald Gerlach 1
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Carbon particle‐filled polymers are frequently used as stretchable conductors and strain sensors. Many of the proposed resistance‐based stretchable strain sensors show non‐monotonic strain response, especially under dynamic conditions. This is commonly attributed to the competing destruction and reformation of the conductive network, but the underlying mechanism is still unknown. Therefore, systematic cyclic tensile tests are performed with carbon black‐filled silicone yarns, which show that the non‐monotonic behavior found depends on strain rate, strain history, and maximum applied strain. Based on the experimental results, a novel model is developed that incorporates the visco‐elastic nature of the polymer and representations of the percolative networks in strain direction as well as the transversal direction. It is shown that the non‐monotonic behavior is a result of the combination of visco‐elasticity and transversal contraction of the percolative network. The model is an equivalent circuit model and its simulation results are in good agreement with the experimental results. The model can be used to further understand the strain sensing behavior of conductive polymers and optimize sensor systems.
中文翻译：
碳颗粒填充聚合物动态电阻响应的实验研究与建模
碳颗粒填充的聚合物通常用作可拉伸导体和应变传感器。提出的许多基于电阻的可拉伸应变传感器表现出非单调应变响应，尤其是在动态条件下。这通常归因于导电网络的竞争性破坏和重新形成，但其潜在机制仍然未知。因此，对炭黑填充的有机硅纱线进行了系统的循环拉伸测试，结果表明，发现的非单调性取决于应变率，应变历史和最大施加应变。根据实验结果，开发了一种新型模型，该模型结合了聚合物的粘弹特性和应变方向以及横向的渗透网络表示。结果表明，非单调行为是粘弹性和渗透网络的横向收缩共同作用的结果。该模型是等效电路模型，其仿真结果与实验结果吻合良好。该模型可用于进一步了解导电聚合物的应变感应行为并优化传感器系统。
更新日期：2020-10-12
中文翻译：
碳颗粒填充聚合物动态电阻响应的实验研究与建模
碳颗粒填充的聚合物通常用作可拉伸导体和应变传感器。提出的许多基于电阻的可拉伸应变传感器表现出非单调应变响应，尤其是在动态条件下。这通常归因于导电网络的竞争性破坏和重新形成，但其潜在机制仍然未知。因此，对炭黑填充的有机硅纱线进行了系统的循环拉伸测试，结果表明，发现的非单调性取决于应变率，应变历史和最大施加应变。根据实验结果，开发了一种新型模型，该模型结合了聚合物的粘弹特性和应变方向以及横向的渗透网络表示。结果表明，非单调行为是粘弹性和渗透网络的横向收缩共同作用的结果。该模型是等效电路模型，其仿真结果与实验结果吻合良好。该模型可用于进一步了解导电聚合物的应变感应行为并优化传感器系统。
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