中文摘要：

通过熔融预混合-高温挤出热拉伸-淬冷-低温成型方法制备导电原位微纤化CB／PET／PE材料，CB选择性分布在PET微纤中，微纤相互搭接形成导电网络。将试样浸入二甲苯溶液测试其电性能对有机液体的敏感性，结果表明，原位微纤化CB／PET／PE材料的电阻率迅速升高，相对于普通CB／PE导电复合材料有更高的响应强度，这是由其特殊的微观结构和形态决定的；另外，材料电阻率的变化与其厚度相关，当试样厚度由140tma增加至500μm时，材料的电阻率对二甲苯的敏感程度降低。

英文摘要：

The conductive in-situ mierofibrillar CB/PET/＇PE composite was prepared by a new polymer processing method including melt mixing beforehand, extrusion at high temperature, quenching and cold molding. CB aggregates are preferably located in PET and the CB/PET microfibrillar formed a conductive network within the PE matrix. It is found that the in-situ microfibrillar CB/PET/PE displays increasing resistivity upon exposure to the xylene and that the relative resistivity is extremely high, nearby 104, attributing to the special internal micro- structure compared with CB/PE composite. Meanwhile, the relative resistivity of CB/PET/PE composite decreases rapidly with the increase of the thickness from 140μm to 500μm.