Abstract:

To improve the performance of glycidyl azide polymer（GAP），by using trimethylolpropane（TMP）as a crosslinker，isophorone diisocyanate（IPDI）as the curing agent，glycidyl azide polymer/ethylene oxide-tetrahydrofuran copolyether（PET）dual-soft segments energetic polyurethane elastomer was synthesized. The elastomer was characterized with FTIR，DSC，XRD and other means. The experimental results showed that some differences in the reaction rates of PET/IPDI and GAP/IPDI were observed at the content of catalyst was 0.1%，but PET and GAP could participate in the formation of polyurethane elastomer together. When PET was introduced in the elastomer，the tensile strength of elastomer increased by 0.9 MPa，elongation increased by 156%. The T_g of two soft segments were observed and its values changed with the content of two soft segments. GAP/PET/TMP/IPDI elastomer was an amorphous polymer and began to decompose at 183℃.