Study properties of blends between acrylonitrile-butadiene rubber and acrylonitrile-butadiene-styrene or poly(styrene-co-acrylonitrile)

Abstract

In this study, the influences of alcohol and gasoline on mechanical and physical properties of blends between acrylonitrile-butadiene rubber (NBR) with acrylonitrile-butadiene-styrene (ABS) orpoly(styrene-co-acrylonitrile) (SAN), and hydrogenated acrylonitrile-butadiene rubber (HNBR) were investigated. Test specimens were prepared by internal mixer, kneader, two-roll mill, and compression molding machines. Theses specimens were immersed in 4 chemical solutions (gasoline 95, acidic E20, E85, and ethanol) at room temperature for 56 days. Mechanical properties were determined using the tensile testing machine. The morphologies of polymer blends were investigated using scanning electron microscope (SEM). The susceptibility to dissolve of sample were confirmed by Infrared spectrum (IR). It had been found that SAN and ABS were partially compatible with NBR. All chemical solutions affected tensile strength, hardness, compression set, dimension change, and volume change. Acidic E20 led to the most swollen samples. The volume change of NBR, NBR/SAN, and NBR/SAN were not quite difference at the ended of test, except HNBR with mostly resisted to alcohol rich but not to gasoline rich. The most susceptible for dissolve in solvents were cure-NBR, NBR and ABS, respectively if HNBR was not concerned in simulation.