Premium
Structure and properties of polypropylene‐wrapped carbon nanotubes composite
Author(s) -
Li WenHua,
Chen XiaoHua,
Yang Zhi,
Xu LongShan
Publication year - 2009
Publication title -
journal of applied polymer science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.575
H-Index - 166
eISSN - 1097-4628
pISSN - 0021-8995
DOI - 10.1002/app.30204
Subject(s) - materials science , carbon nanotube , composite number , polypropylene , composite material , percolation threshold , maleic anhydride , ultimate tensile strength , dispersion (optics) , percolation (cognitive psychology) , nanocomposite , covalent bond , electrical resistivity and conductivity , polymer , copolymer , chemistry , physics , engineering , optics , organic chemistry , neuroscience , electrical engineering , biology
By means of in situ graft method, polypropylene (PP)‐wrapped carbon nanotubes (CNTs) composite were prepared. Infrared spectroscopy (IR) results showed that there was covalent linkage between PP and CNTs via maleic anhydride (MAH) grafting. Owing to the uniform dispersion of CNTs and covalent adhesion between PP and CNTs, the tensile strength of PP‐wrapped CNTs composite was higher than that for neat PP by 110%, and a 74% increase as compared to the CNTs/PP (with the same CNTs content) composite. The further test showed a strong mechanical behavior with up to 113% increase in Young's modulus of the neat PP. Based on the uniform dispersion of CNTs, the electrical conductivity of PP‐wrapped CNTs composite increased sharply by up to seven orders of magnitude with 4 wt % CNT fillers. As a result, the volume resistivity was decreased with increase in the CNT content that could be governed in a percolation‐like power law with a relatively low percolation threshold. © 2009 Wiley Periodicals, Inc. J Appl Polym Sci, 2009