English Abstract
Improvement in Dispersion of MWCNTs into EPDM

Hitoshi IWABUKI1
Morinobu ENDO3
1 ; Industrial Technology Center of Okayama Prefecture, Kitaku, Okayama, Japan
2 ; Nissin Kogyo Co., Ltd., Toumi-shi, Nagano, Japan
3 ; Faculty of Engineering Shinshu University, Nagano, Japan
Nippon Gomu Kyokaishi,(2009),82(6),247-251 Original Paper in Japanese

In this study, we examined the improvement in dispersion of multi-walled carbon nanotubes (MWCNTs) into ethylene-propylene-diene rubber (EPDM). The dispersion of MWCNTs was observed by an optical microscope and a scanning electron microscope. Normally, MWCNTs were hardly dispersed into non-polar EPDM matrix, and large agglomerates of MWCNTs were observed in the composites. Increase of the mixing time decreased the number of large agglomerates of MWCNTs. At the same mixing time, the higher the milling temperature was, the worse the macro-dispersion of MWCNTs became. However, in order to disperse MWCNTs finely and uniformly, it was effective to raise the mixing temperature.

(Received on September 18, 2008)
(Accepted on February 22, 2009)

Multi-walled Carbon Nanotube, EPDM, NR, Dispersion, Nanocomposite