"Comparison of structure and properties of different hydrogenated nitrile rubbers"

Molecular weight and its distribution, molecular structure composition, curing characteristics, Mooney viscosity, physical and mechanical property, thermal-oxidative aging resistance, low temperature performance and catalyst residual amount of similar brand hydrogenated nitrile rubber (HNBR) products from Zannan SciTech Co Ltd and Zeon Corporation of Japan were mainly compared. The results showed that molecular weight and its distribution, molecular structure composition, Mooney viscosity of raw rubber, scorch time of compound, thermal-oxidative aging resistance and low temperature performance of HNBR ZN 35156 from Zannan SciTech Co Ltd were generally equivalent to those of Zetpol 2010 L from Zeon Corporation, and compared with Zetpol 2010 L, ZN 35156 raw rubber had somewhat lower saturation degree, and ZN 35156 compound had a little faster curing rate and slightly poorer processing performance, while ZN 35156 vulcanizate had slightly superior physical and mechanical properties such as hardness and tensile strength; molecular weight and its distribution, molecular structure composition, Mooney viscosity of raw rubber, scorch time of compound and thermal-oxidative aging resistance of HNBR ZN 35158 from Zannan SciTech Co Ltd were basically similar to those of Zetpol 2010 from Zeon Corporation, and compared with Zetpol 2010, bound acrylonitrile content of ZN 35158 raw rubber was greater, ZN 35158 compound had a little faster curing rate and slightly poorer processing performance, and ZN 35158 vulcanizate had slightly poorer low temperature performance, while ZN 35158 vulcanizate had slightly superior physical and mechanical properties such as hardness and tensile strength; hydrogenation catalysts of Zannan SciTech Co Ltd and Zeon Corporation were ruthenium-based catalyst and palladium-based catalysts, respectively, and catalyst residual amounts in HNBR products of Zannan SciTech Co Ltd were re-latively less.