Uncross-linked polypropylene (PP)/ethylene-propylene-diene (EPDM)/multi walled carbon nanotube (MWCNT) and dynamically vulcanized PP/EPDM/MWCNT nanocomposites
Article first published online: 30 JUL 2010
Copyright © 2010 John Wiley & Sons, Ltd.
Polymers for Advanced Technologies
Volume 22, Issue 12, pages 2273–2278, December 2011
How to Cite
Min, K.-T. and Kim, G.-H. (2011), Uncross-linked polypropylene (PP)/ethylene-propylene-diene (EPDM)/multi walled carbon nanotube (MWCNT) and dynamically vulcanized PP/EPDM/MWCNT nanocomposites. Polym. Adv. Technol., 22: 2273–2278. doi: 10.1002/pat.1756
- Issue published online: 23 NOV 2011
- Article first published online: 30 JUL 2010
- Manuscript Accepted: 22 APR 2010
- Manuscript Revised: 20 APR 2010
- Manuscript Received: 20 JAN 2010
- Dongseo University
- carbon nanotube;
- surface resistivity
In this study, relatively large amounts of polypropylene (PP), ethylene-propylene-diene (EPDM), and multi-walled carbon nanotube (MWCNT) were melt-mixed with and without DCP. Dynamically vulcanized PP/EPDM (TPV)/MWCNT nanocomposites were prepared by two methods: the MWCNTs were added either before or after the dynamic vulcanization of the blends. The effects of composition, rotor speed, and dynamic vulcanization on their surface resistivity were investigated. The surface resistivity of uncross-linked PP/EPDM/MWCNT nanocomposites increases with increasing the content of EPDM. At PP/EPDM (70/30 wt%) nanocomposite with 1.5 phr MWCNT, slightly lower surface resistivity is obtained by increasing the rotor speed during mixing. However, for PP/EPDM (50/50 wt%) and PP/EPDM (30/70 wt%) nanocomposites, surface resistivity decreases with increasing the rotor speed from 30 to 60 rpm. But further increase in rotor speed (90 rpm) leads to an increase of surface resistivity. When the MWCNTs were added after the dynamic vulcanization of the blends, the surface resistivity of TPV70/MWCNTnanocomposite is lower than that of uncross-linked PP/EPDM/MWCNT nanocomposite. However, when the MWCNTs were added before the dynamic vulcanization of the blends, the surface resistivity of TPV70/MWCNT nanocomposite is >1012 Ω/square. Copyright © 2010 John Wiley & Sons, Ltd.