Anomalous attenuation of the positive temperature coefficient of resistivity in a carbon-black-filled polymer composite with electrically conductive in situ microfibrils
Anomalous attenuation of the positive temperature coefficient of resistivity in a carbon-black-filled polymer composite with electrically conductive in situ microfibrils
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DOI：
10.1063/1.2222339
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发表时间：
2006-07
影响因子：
4
通讯作者：
Xiang-Bin Xu;Zhong‐Ming Li;K. Dai;Ming-Bo Yang
中科院分区：
文献类型：
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作者：
Xiang-Bin Xu;Zhong‐Ming Li;K. Dai;Ming-Bo Yang
原位微纤维炭黑∕聚对苯二甲酸乙酯∕聚乙烯复合材料在聚乙烯熔点以上无氧等温处理足够时间后，其正电阻率温度系数（PTCR）显著衰减。不均匀的表面微观结构和大尺寸的微原纤维是控制PTCR衰减的关键因素，并提出了一个模型来解释这种异常现象。因此，开发了一种有效的方法来制备在宽温度范围内具有稳定电导率的可回收的半结晶热塑性导电聚合物复合材料。
The positive temperature coefficient of resistivity (PTCR) of in situ microfibrillar carbon black∕poly (ethylene terephthalate)∕polyethylene composite attenuates dramatically after a sufficient time of isothermal treatment without oxygen above the melting region of polyethylene. The inhomogeneous surface microstructure and the large size of the microfibrils are the key factors controlling PTCR attenuation, through which a model is proposed to explain this anomalous phenomenon. An effective approach is accordingly developed to prepare recyclable semicrystalline thermoplastic based electrically conductive polymer composite with steady conductivity in wide temperature range.