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首页> 外文期刊>Journal of Applied Polymer Science >Resistivity-temperature behavior of carbon fiber filled semicrystalline composites
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Resistivity-temperature behavior of carbon fiber filled semicrystalline composites

机译：碳纤维填充半结晶复合材料的电阻率-温度行为

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Carbon fiber (CF) filled low-density polyethylene (LDPE) composites were prepared by the conventional melt-mixing method. The distribution of CF in the composite was studied by wide-angle X-ray diffraction (WAXD) and scanning electron microscope (SEM) observations. A phenomenological model was proposed to illustrate the resistivity-temperature behavior of CF-filled semicrystalline composites. The effects of the content and aspect ratio of CF on the positive temperature coefficient (PTC) and the room temperature resistivity were elucidated. A balance between the PTC intensity and the room-temperature resistivity can be achieved by using a mixture of CFs with low and high aspect ratios. The negative temperature coefficient (NTC) phenomenon can be effectively eliminated by crosslinking under gamma-ray radiation, and the crosslinked composite exhibits a higher PTC intensity and PTC transition temperature than the noncrosslinked counterpart. (C) 2003 Wiley Periodicals, Inc. [References: 33]
机译：碳纤维（CF）填充的低密度聚乙烯（LDPE）复合材料是通过常规的熔融混合方法制备的。通过广角X射线衍射（WAXD）和扫描电子显微镜（SEM）观察研究了CF在复合材料中的分布。提出了一种现象学模型来说明CF填充半结晶复合材料的电阻率-温度行为。阐明了CF的含量和纵横比对正温度系数（PTC）和室温电阻率的影响。 PTC强度和室温电阻率之间的平衡可以通过使用纵横比低和高的CF的混合物来实现。负温度系数（NTC）现象可以通过在伽马射线辐射下进行交联来有效消除，并且交联的复合材料比未交联的复合材料具有更高的PTC强度和PTC转变温度。 （C）2003 Wiley Periodicals，Inc. [参考：33]

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