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Effect of polyamide 6 on the morphology and electrical conductivity of carbon black-filled polypropylene composites

Authors :
Xuewei Zhang
Jiang Liu
Yi Wang
Wei Wu
Source :
Royal Society Open Science, Vol 4, Iss 12 (2017)
Publication Year :
2017
Publisher :
The Royal Society, 2017.

Abstract

Carbon black (CB)-filled polypropylene (PP) with surface resistivity between 106 and 109 Ω sq−1 is the ideal antistatic plastic material in the electronics and electric industry. However, a large amount of CB may have an adverse effect on the mechanical properties and processing performance of the material, thus an improved ternary system is developed. Blends of CB-filled PP and polyamide 6 (PA6) have been prepared by melt blending in order to obtain electrically conductive polymer composites with a low electrical percolation threshold based on the concept of double percolation. The morphological developments of these composites were studied by scanning electron microscopy. The results showed that CB particles were selectively dispersed in PA6 phases due to the good interaction and interfacial adhesion between CB and PA6. At the same CB loadings, the surface resistivity of PP/PA6/CB composite was smaller than that of PP/CB composite system, which indicated the better conductivity in the former composite. The increasing amount of PA6 in the composites changed the morphology from a typical sea–island morphology to a co-continuous morphology. What is more, with 8 wt% of CB and PP/PA6 phase ratio of 70/30 in which the PP and PA6 phases formed a co-continuous structure, the electrical conductivity of the composite peaked at 2.01 × 105 Ω sq−1.

Details

Language :
English
ISSN :
20545703
Volume :
4
Issue :
12
Database :
Directory of Open Access Journals
Journal :
Royal Society Open Science
Publication Type :
Academic Journal
Accession number :
edsdoj.210a83ed5a824c73bf0e27c5f02715ac
Document Type :
article
Full Text :
https://doi.org/10.1098/rsos.170769