Effect of Microstructure on HTPB Based Polyurethane (HTPB-PU)

Abstract

Effect of HTPB (Hydroxy-terminated polybutadiene) microstructure on HTPB-PU (HTPB based polyurethane network) were investigated. These evaluations were carried out by mean of several characterization like measurement of gel point, mechanical properties, hardness, cross link density measurement and thermal analysis like STA (TG-DTA). The results showed that polyurethane synthesized from HTPB prepolymer containing higher amount of cis and trans microstructure i.e. Grade II exhibited better pot life, good mechanical properties and thermal stability with higher cross link density.