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Dynamic Electrical and Rheological Percolation in Isotactic Poly(propylene)/Carbon Black Composites
Author(s) -
Huang Shilin,
Liu Zhengying,
Yin Chaolu,
Wang Yu,
Gao Yongjuan,
Chen Chen,
Yang Mingbo
Publication year - 2012
Publication title -
macromolecular materials and engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.913
H-Index - 96
eISSN - 1439-2054
pISSN - 1438-7492
DOI - 10.1002/mame.201100150
Subject(s) - materials science , carbon black , composite material , rheology , percolation (cognitive psychology) , composite number , tacticity , percolation threshold , compounding , electrical resistivity and conductivity , polymer , natural rubber , polymerization , engineering , neuroscience , electrical engineering , biology
Abstract Flocculation of the filler particles in isotactic poly(propylene)/carbon black (iPP/CB) composite melts provides a way to understand electrical and rheological percolation processes. The iPP/CB composites were prepared by mild compounding to ensure a good filler dispersion. Electrical and dynamic rheological characterizations are used to monitor the network formation process in the composite melts. It is found that rheological percolation is more difficult to achieve than the electrical percolation in iPP/CB composites. The discrepancy comes from the different mechanisms for electron transport and stress transfer through the filler network.