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- Title
Preparation and properties of carbon black/polymer composites with segregated and double-percolated network structures.
- Authors
Bao, Yu; Xu, Ling; Pang, Huan; Yan, Ding-Xiang; Chen, Chen; Zhang, Wei-Qin; Tang, Jian-Hua; Li, Zhong-Ming
- Abstract
A carbon black (CB)/low-density polyethylene (LDPE)/ultrahigh-molecular-weight polyethylene (UHMWPE) composite with a segregated and double-percolated structure has been fabricated using the solution mixing and high-speed mechanical mixing method. Structural observations show that the conducting CB/LDPE layers were only dispersed at the interface of UHMWPE granules and formed a well-developed CB conductive network with a percolation threshold of 0.26 vol%. The low percolation threshold in CB/LDPE/UHMWPE composites can be explained by the segregated and double-percolated networks of CB within the polymer matrix. A noticeable double positive temperature coefficient of resistivity can be observed around the melting temperature of LDPE and UHMWPE followed by a negative temperature coefficient of resistivity. The microstructure evolution of CB/LDPE/UHMWPE composites can be observed and explained by in situ optical micrographs.
- Subjects
POLYMERIC composite testing; CARBON-black; HIGH density polyethylene; LOW density polyethylene; ELECTRIC properties of polymeric composites; POLYMERIC composites; THERMAL properties
- Publication
Journal of Materials Science, 2013, Vol 48, Issue 14, p4892
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-013-7269-x