We demonstrate that an insulating diblock copolymer system (DBC) filled with conductive fillers can be used as an electrically responsive soft composite that changes its conductivity in response to temperature-induced changes in its morphology. By combining the phase field model describing the morphology of the DBC system with the Monte Carlo simulations and the resistor network model describing electrical properties of the filler network, we calculate the conductivity of this composite. The calculated conductivity is found to essentially depend, in particular, on the temperature of the composite. Changing the temperature is shown to result in morphological changes in the DBC system causing the structural changes in the filler network. In particular, the order-disorder transition in the host DBC system is found to be accompanied by the conductor-insulator transition in the filler network. The effect of the difference between the affinities of the fillers for dissimilar copolymer blocks on the composite conductivity, as well as the effect of the repulsive and attractive interaction between fillers, is considered in detail.

中文翻译：

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填充二嵌段共聚物电导率的温度依赖性

我们证明，填充有导电填料的绝缘二嵌段共聚物系统（DBC）可以用作电响应性软复合材料，该复合材料响应于温度引起的形态变化而改变其电导率。通过将描述DBC系统形态的相场模型与Monte Carlo模拟和描述填充网络电特性的电阻器网络模型相结合，我们可以计算出该复合材料的电导率。发现计算出的电导率特别地取决于复合材料的温度。结果表明，改变温度会导致DBC系统的形态发生变化，从而导致填料网络的结构发生变化。尤其是，发现主机DBC系统中的有序无序过渡伴随着填充网络中的导体-绝缘体过渡。详细考虑了不同共聚物嵌段的填料亲和力之间的差异对复合材料电导率的影响，以及填料之间排斥和吸引相互作用的影响。