Abstract Herein, the solution-melt blended multi-walled carbon nanotubes (MWCNTs)/isotactic polypropylene composites are molded by an overflow microinjection molding. All parts exhibit the highly oriented structures, and the number of oriented shish-kebab structures progressively increase with increasing MWCNTs content. More importantly, small amount of MWCNTs (i.e., 0.1 wt%) can significantly improves crystallization rate and crystallinity of all composite parts, nevertheless, the formation of β-crystal is remarkably suppressed. Moreover, compared with the pure part, tensile modulus, toughness and thermostability of composite parts are mildly enhanced. This work provides a facile method to fabricate high-performance composite parts via overflow microinjection molding, which would lay a foundation for optimizing the macroscopic performances of polymer-based composites.

中文翻译：

---

少量多壁碳纳米管对溢流显微注射成型等规聚丙烯结晶和热力学性能的影响

摘要 本文采用溢流微注射成型方法制备了溶液-熔融共混多壁碳纳米管（MWCNTs）/全同立构聚丙烯复合材料。所有部件都表现出高度取向的结构，并且随着 MWCNTs 含量的增加，取向的烤肉串结构的数量逐渐增加。更重要的是，少量的 MWCNTs（即 0.1 wt%）可以显着提高所有复合材料部件的结晶速率和结晶度，然而，β-晶体的形成受到显着抑制。此外，与纯零件相比，复合材料零件的拉伸模量、韧性和热稳定性略有提高。这项工作提供了一种通过溢流微注射成型制造高性能复合材料部件的简便方法，