Abstract: Polyamide 6/nitrile-butadiene rubber (PA6/NBR) blends were prepared via melt blending from PA6 and different types of NBR. The mixing torque, mechanical property, and solvent resistance of the blends were studied. With increasing content of rubber phase, the melt viscosity and swelling ratio increased, while tensile strength decreased. Infrared spectra showed that there were chemical reaction between NBR and PA6 under high temperature and high shear rate. With increasing content of nitrile, the equilibrium torque and tensile strength of PA6/NBR blends increased, solvent resistance reduced.

Key words: polyamide 6, nitrile-butadiene rubber, blend, solvent resistance, tensile strength