A series of polyamide 6/multi-walled carbon nanotubes (PA6/CNT) nanocomposites were prepared using a masterbatch dilution process, followed by microinjection molding of a part with a three-step decrease in thickness along the flow direction. Morphology observations revealed that there was a preferential orientation of CNT in the flow direction, which is attributed to the prevailing high shear rates in µIM. The distribution of CNT after melt processing was evaluated by dissolving experiments. Additionally, the correlation between electrical resistivity and development of microstructure for each section of the microparts was considered. The thermal behavior of PA6/CNT nanocomposites and corresponding microparts was evaluated using differential scanning calorimetry. Results indicated that the addition of CNT had little effect on the melting behavior of PA6/CNT nanocomposites and corresponding microparts. However, the crystallization behavior was changed significantly and a double crystallization peak was observed for samples incorporating CNT.

使用母料稀释工艺制备了一系列聚酰胺6 /多壁碳纳米管（PA6 / CNT）纳米复合材料，然后将其零件沿流动方向进行三步厚度减小的微注射成型。形态学观察表明，CNT在流动方向上存在优先取向，这归因于µIM中普遍存在的高剪切速率。通过溶解实验评价熔融加工后的CNT的分布。此外，还考虑了电阻率与微零件每个部分的微结构发展之间的相关性。使用差示扫描量热法评估了PA6 / CNT纳米复合材料和相应的微零件的热行为。结果表明，CNT的添加对PA6 / CNT纳米复合材料和相应的微部件的熔融行为影响很小。但是，结晶行为发生了显着变化，并发现掺入CNT的样品出现了一个双结晶峰。