 Abstract synthetic high-performance fibers are being developed to provide improved impact protection. However, these fibers have inherent conflicts between strength, toughness, and modulus which make it difficult to produce them. In this study, researchers found that adding a small amount of short-aminated single-walled carbon nanotubes can simultaneously increase the strength, toughness, and modulus of these fibers. This was achieved through improving the crystallinity and orientation of the fibers as well as increasing the interfacial interaction between the fibers and polymerized SWNTs. The results show that this approach could be used to create stronger, more resilient materials for use in impact protection applications. This article was authored by Jie Jinluo, Ye Wen, Xiang Zhengqiu, and others.