An anion-exchange membrane was prepared by the amination of chlorinated polypropylene and polyethyleneimine at a low temperature and was investigated with respect to not only its physical properties but also its electrochemical properties. The degrees of amination were 50.16, 53.76, 57.11, and 65.29% at 30, 40, 50, and 55 degrees C, respectively. The base polymer membrane had no water uptake, whereas that of the aminated polymer membrane was 0.254, 0.296, 0.298, and 0.319 g of H2O/g of dry membrane, respectively, with increasing amination. The prepared membranes possessed an ion-exchange capacity in the range of 1.257-2.000 mequiv/g of dry membrane and a fixed ion concentration in the range of 4.492-6.261 mequiv/g of H2O. The ionic conductivity of the aminated polymer membrane was highest when the water uptake was highest. Those of the prepared membrane were in the range of 0.89 x 10(-2) to 1.36 x 10(-2) S/cm. (C) 2009 Wiley Periodicals, Inc. J Appl Polym Sci 112: 830-835, 2009