English Abstract
Evaluation of Uniformity of NBR Compounds Using Zinc Oxide as a Marker

Toyohiko GONDOH 1, Tetsuo MORI 1, Michiharu TOH 2, and Mutsuhisa FURUKAWA 3
1; Department of Biochemistry and Applied Chemistry, Kurume National College of Technology, Kurume, Japan
2; Kurume Research Park, Kurume, Japan
3; Graduate School of Science and Technology, Nagasaki University, Nagasaki, Japan
Nippon Gomu Kyokaishi,(2009),82(5),221-226 Original Paper in Japanese

The mechanical properties of vulcanized rubbers were influenced by dispersion state of additives in a rubber matrix, and also by the vulcanization condition of rubber compound. The purpose of kneading of rubber and additives is to obtain rubber compounds with uniform composition by dispersing finely and uniformly additives such as carbon black, zinc oxide, accelerator, etc. into a rubber. In this work, the dispersion state and uniformity of additives in a rubber was evaluated from distribution diagrams of zinc oxide as a marker. The uniformity was also confirmed by the mechanical properties of the vulcanized NBR compounds.

(Received on October 20, 2008)
(Accepted on December 15, 2008)

Rubber, Mixing, Compound, Additive, Uniformity, Dispersion, Zinc Oxide Marker