Abstract: Glycidyl azide polymers, which are used as binders in composite explosive and propellant compositions, include hydroxyl groups which react with the isocyanate curing agent normally used in such compositions. Since the functionality of available linear glycidyl azide polymers is less than two, triols and/or triisocyanates are needed to crosslink the chains to form a matrix. A glycidyl azide polymer with increased functionality (higher than two) and reactivity obviates the need for triols and triisocyanates in the compositions. Moreover, a glycidyl azide polymer with primary hydroxyl groups would give faster curing reactions at lower temperatures without gassing problems, eliminating the need for a catalyst. Examples of glycidyl azide polymer having increased functionality have one of the formulae: ##STR1## wherein R is ##STR2## wherein m and n are different from zero, and m+n is 4 to 60.