文献类型：期刊文献

英文题名：Effect of phase-scale regulation on electromagnetic shielding effectiveness of co-continuous PP/PBT/CNTs composites

作者：Wang, Yu[1];Zhang, Xu[1];Li, Guo[1];Zhu, Huihao[1];Ma, Yulu[1];Xie, Linsheng[1]

机构：[1]East China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China

年份：2025

卷号：260

外文期刊名：MATERIALS & DESIGN

收录：;EI(收录号：20254719528136);WOS:【SCI-EXPANDED(收录号:WOS:001622145800001)】；

基金：The authors are grateful for financial support from the National Natural Science Foundation of China (Grant No. 51273065) .

语种：英文

外文关键词：Carbon nanotube; Selective localization; Phase-domain regulation; EMI shielding; Compatibilizer

摘要：Herein, the carbon nanotubes (CNTs)-induced polymer-phase scale behavior was regulated in polypropylene/poly(butylene terephthalate) (PP/PBT) composites. To determine the effects of CNTs migration from the PP to the PBT phase on phase viscosity, morphology, and domain scale, PP/PBT/CNTs composites were prepared and systematically analyzed using experimental characterizations and numerical simulations. During composite preparation, the viscosity of both phases transited, the domain scale was refined from 3.1 mu m to 1.8 mu m, and interphase compatibility was significantly improved. When the CNTs content reached 3 vol%, the migration behavior became saturated. Furthermore, a co-continuous structure with double percolation, as along with more conductive pathways and complex interfaces, was formed in the PP/PBT/CNTs composites, leading to performance stabilization. Consequently, the prepared PP/PBT/CNTs composites exhibited a conductive percolation threshold of 0.19 vol% CNTs and an electromagnetic interference (EMI)-shielding effectiveness (SE) of similar to 36 dB, accompanied by significant reflection and absorption losses. Furthermore, to further regulate phase morphology, compatibilizers such as maleic anhydride grafted PP (PP-g-MAH), glycidyl methacrylate grafted PP (PP-g-GMA), and glycidyl methacrylate grafted polyolefin elastomer (POE-g-GMA) were incorporated, further confirming the correlation between phase-domain size and EMI-SE. Overall, this study demonstrates a strategy for designing eco-friendly nanocomposites with both ultralow percolation thresholds and excellent EMI-SE.