A copolymer consisting of bis(azidomethyl) oxetane and hydroxyl-terminated polybutactiene was synthesized with different monomer ratios via an activated monomer mechanism. The copolymer thus obtained was characterized with Fourier transform infrared, H-1-NMR, molecular weight, and polyclispersity measurements. Rheological and thermal studies were also carried out. The mechanical properties of the gum stock obtained through curing with toluene diisocyanate and crosslinking with pyrogallol at about 50 degrees C were also determined. This was an attempt to combine the useful properties of hydroxyl-terminated polybutacliene (a nonenergetic binder providing excellent mechanical properties) and poly[bis(azidomethyl) oxetane] (an energetic binder). (c) 2007 Wiley Periodicals, Inc.