VO2-enhanced double positive temperature coefficient effects of high density polyethylene/graphite composites. (12th December 2018)

• Record Type: Journal Article
• Authors: Zhang, Peng; Hou, Yanling; Wang, Binbin
• Is Part Of: Materials research express. Volume 6:Number 3(2019)
• Publication Date: 2018-12-12
• Subjects: PTC effect -- high density polyethylene -- vanadium dioxide -- graphite; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/aaf589
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: High density polyethylene/graphite (HDPE/Gr) composites were fabricated by the melt-blending method, and displayed the enhanced positive temperature coefficient (PTC) effect and decreasing room-temperature resistivity with the addition of vanadium dioxide (VO2 ). Especially, HDPE/Gr composite with 6 wt% VO2 showed the remarkable double PTC effects and excellent reproducibility. Based on obvious two-shape structure and heating amorphous evolution of HDPE composites, the simple filler-compensated conductive networks and unique dispersion model were constructed to further understand the PTC behavior. Finally, it was concluded that the excellent double PTC effects of single polymer composites were achieved by the introduction of second filler.