NOVOLAC EPOXY-RESIN HYDROXY-TERMINATED ADIPATE BASED INHIBITION SYSTEM FOR DOUBLE-BASE PROPELLANTS

Six hydroxy terminated adipates based on adipic acid and glycols such as ethylene glycol (EG), diethylene glycol (DEG), triethylene glycol ( TEG), polyethylene glycol of molecular weight 200 (PEG-200), propyl gl ycol (PG) and neopentyl glycol (NPG) have been synthesized, and their IR spectra recorded. Several formulations of novolac epoxy resin (Dobe ckot, E4) with various adipates have been made, and characterized for tensile strength, elongation, gel time, bond strength with dinitro tol uene (DNT) containing double-base (DB) propellants, nitroglycerine (NG ) and dioctyl adipate (DOA) absorption, heat resistance, burning rate and oxygen index. Based on these characteristics, EA-19 has been selec ted for inhibition and static evaluation of DB propellants after condi tioning at ambient (25 degrees C for 24 h), hot (50 degrees C for 16 h ) and cold (-40 degrees C for 20 h) temperatures. The nature of P-t pr ofiles suggest that EA-19 is a potential inhibition system for DNT con taining DB propellants.