CB含量对微纤化导电复合材料CB/PET/PE非等温结晶的影响

Influence of Carbon Black Content on the Non-Isothermal Crystallization Behavior of Microfibrillar CB/Poly (Ethylene Terephthalate) /Polyethylene Conductive Microfibrillar Composites

采用差示扫描量热仪(DSC)研究了不同CB含量的原位微纤化复合材料CB/PET/PE在不同的冷却速率(2.5℃/min,5℃/min,10℃/min,20℃/min)的非等温结晶行为,采用扫描电子显微镜(SEM)观察微纤形态。结果表明,随CB含量增加,复合材料结晶起始温度降低,且相对结晶速率减小。SEM观察发现,CB的加入改变了微纤形态,随CB含量增加,CB粒子逐渐占据了微纤表面且纤维形态变差。

Non-isothermal crystallization of carbon black（CB）/poly（ethylene terephthalate） （PET） /polyethylene（PE） conductive microfibrillar composites with electrical conductivity with different CB contents at different cooling rates were studied by differential scanning calorimetry （DSC）. The morphology of microfibrils was examined by scanning electronic microscopy （SEM）. The results show that with the increase of CB content, onset crystallization temperatures of the composite decline, and relative crystallization rate decreases. SEM observation shows that the morphology of microfibrils is changed owing to the addition of CB, the morphology of microfibrils is deteriorated with the increase of CB concentration, moreover, CB particle takes up the surface of microfibrils, which retards crystallization of the composites.