Fabrication and characterization of homogeneous composites of polypropylene and multiwalled carbon nanotubes |
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Authors: | Jong‐Hwan Jeon Seung‐Hwa Lee Jung‐Hyurk Lim Kyung‐Min Kim |
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Affiliation: | Department of Polymer Science and Engineering, Chungju National University, Chungju, Chungbuk 380‐702, Korea |
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Abstract: | The polypropylene‐grafted multiwalled carbon nanotubes (PP‐MWCNTs) were produced from the reaction of PP containing the hydroxyl groups and MWCNTs having 2‐bromoisobutyryl groups. The PP‐MWCNTs had a significantly rougher surface than the original MWCNTs. PP‐MWCNTs had PP layers of thickness 10–15 nm on the outer walls of the MWCNTs. PP/PP‐MWCNT composites and PP/MWCNT composites were prepared by solution mixing in o‐xylene. Unlike PP/MWCNT composites, PP‐MWCNTs were homogeneously dispersed in the PP matrix. As a consequence, the thermal stability and conductivity of PP/PP‐MWCNT composites were dramatically improved even if only 1 wt % of PP‐MWNTs was added to the PP matrix. The good miscibility of PP and PP‐MWCNTs plays a critical role in the formation of the homogeneous composites and leads the high thermal stability and conductivity. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012 |
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Keywords: | multiwalled carbon nanotubes polypropylene‐grafted multi‐walled carbon nanotubes PP/MWCNT composite homogeneous dispersion solution mixing thermal conductivity |
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