Preparation and properties of reproducible carboxyl nitrile rubber ionic network

Abstract

Zinc oxide (ZnO) was added to carboxyl nitrile rubber (XNBR) by in-situ blending in situ reaction to form unsaturated zinc carboxylate, and ionic XNBR was prepared by constructing ion network. When no filler was added, ionic XNBR had high strength and high elasticity, and the reversibility of ion network made the product repeatable. Fourier transform infrared spectroscopy showed that carboxyl group reacted with ZnO to form zinc carboxylate. When the amount of ZnO increased to 10 phr. The mechanical properties of the obtained materials were optimal. After the molded specimen was cut into pieces and remolded, the strength retention rate was as high as 99.5%. The dielectric test results showed that the existence of ion network accelerates the ion conduction rate and significantly improved the antistatic properties of the material.

Keywords

• carboxyl nitrile rubber
• in situ blending
• high strength
• repeatability
• ion network
• dielectric property