Theoretical and experimental study of the dynamic percolation behaviour of carbon black filled polymethylmethacrylate prior and after shear – A novel three phase approach
Theoretical and experimental study of the dynamic percolation behaviour of carbon black filled polymethylmethacrylate prior and after shear – A novel three phase approach
复制标题
炭黑填充聚甲基丙烯酸甲酯剪切前后动态渗流行为的理论与实验研究——三相新方法
DOI：
10.1016/j.eurpolymj.2014.01.011
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发表时间：
2014
影响因子：
6
通讯作者：
Schubert D.W.
中科院分区：
文献类型：
--
作者：
Krückel J;Schubert D.W.
从理论和实验两方面研究了炭黑填充聚甲基丙烯酸甲酯在静态条件下电导率随时间的增长（动态渗流）。因此，提出了一个基于两种不同骨料尺寸的三相模型，得到了能够描述实验数据的可管理的拟合函数。为了测试该模型，在短剪切步骤之前和之后监测复合材料的时间依赖性电导率。结果发现，剪切步骤导致电导率的显着变化，并影响系统的聚集动力学，这与我们提出的物理模型一致。此外，它可以被示出，该模型具有更高的准确性，在描述实验数据相比，现有的聚集模型，其中只有一个聚集体的大小被认为是。
The time-dependent increase of the electrical conductivity (dynamic percolation) of carbon black filled polymethylmethacrylate under quiescent conditions was studied theoretically and experimentally. Therefore, a three phase model based on two different aggregate sizes is proposed leading to manageable fit functions, which are able to describe the experimental data. In order to test the model, the time-dependent electrical conductivity of the composites was monitored prior and after a short shear step. It was found that the shear step leads to a significant change in the conductivity and influences the aggregation kinetics of the system which is in agreement with our physical model proposed. Moreover, it could be shown, that the model has a much higher accuracy in describing the experimental data compared to the existing aggregation models where only one aggregate size is considered.