Nonlinear current-voltage characteristics of conductive polyethylene composites with carbon black filled pet microfibrils |
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Authors: | Qian-ying Chen Jing Gao Kun Dai Huan Pang Jia-zhuang Xu Jian-hua Tang Zhong-ming Li |
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Institution: | 1. College of Polymer Science and Engineering, State Key Laboratory of Polymer Materials Engineering, Sichuan University, Chengdu, 610065, China
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Abstract: | Current-voltage electrical behavior of in situ microfibrillar carbon black (CB)/poly(ethylene terephthalate) (PET)/polyethylene (PE) (m-CB/PET/PE) composites with various CB concentrations at ambient temperatures was studied under a direct-current electric field. The current-voltage (I-V) curves exhibited nonlinearity beyond a critical value of voltage. The dynamic random resistor network (DRRN) model was adopted to semi-qualitatively explain the nonlinear conduction behavior of m-CB/PET/PE composites. Macroscopic nonlinearity originated from the interfacial interactions between CB/PET micro fibrils and additional conduction channels. Combined with the special conductive networks, an illustration was proposed to interpret the nonlinear I-V characteristics by a field emission or tunneling mechanism between CB particles in the CB/PET microfibers intersections. |
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Keywords: | Microfibrillar blend Conductive polymer composites PE PET Non-linear current-voltage |
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