Premium
Effects of layer‐multiplying process on conducting properties of multilayer composites consisting of alternating layers of carbon black/polypropylene and polyamide 6/polypropylene
Author(s) -
Gao Wanli,
Shen Jiabin,
Guo Shaoyun
Publication year - 2014
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.23663
Subject(s) - polypropylene , materials science , polyamide , composite material , carbon black , extrusion , layer (electronics) , composite number , electrical resistivity and conductivity , percolation threshold , percolation (cognitive psychology) , natural rubber , neuroscience , electrical engineering , biology , engineering
Composite materials consisting of alternating layers of carbon black/polypropylene (PPCB) and polypropylene (PP) were fabricated by layer‐multiplying coextrusion. A negative effect of the layer‐multiplying process on the conducting percolation of CB in PPCB layers was revealed by electrical resistivity measurements. When polyamide 6 (PA6) was introduced into pure PP layers, the resistivity was less than that of a system without the nylon phase. Morphological and crystalline examinations demonstrated that with increasing the number of layers, PA6 was elongated along the extrusion direction and adhered to by some CB particles. This was considered to be beneficial for the formation of new conducting pathways that compensated for the negative effect of the layer‐multiplying process on conductivity. POLYM. ENG. SCI., 54:1471–1476, 2014. © 2013 Society of Plastics Engineers