聚叠氮缩水甘油醚/聚乙二醇双软段含能聚氨酯弹性体的性能

Properties of Glycidyl Azide Polymer/Polyethylene Glycol Dual-Soft Segments Energetic Polyurethane Elastomer

为改善聚叠氮缩水甘油醚(GAP)的性能,以三羟甲基丙烷(TMP)为交联剂,异佛尔酮二异氰酸酯(IPDI)为固化剂,选用聚乙二醇(PEG)制备出GAP/PEG/TMP/IPDI双软段含能聚氨酯弹性体,采用红外光谱(FT-IR)、差示扫描量热(DSC)等手段进行了表征。实验结果表明,弹性体中引入聚乙二醇(PEG),拉伸强度提高168%,延伸率提高77%,所选PEG软段分子量较小,弹性体中只出现了GAP软段的Tg。随交联剂含量的增大,GAP软段的Tg由-36.85℃上升到-34.81℃,继而又下降到-40.31℃,弹性体的热分解分两段进行,初始分解温度为183℃。

To improve the performance of glycidyl azide polymer（GAP）,trimethylolpropane（TMP） as the crosslinker,isophorone diisocyanate（IPDI） as the curing agent,glycidyl azide polymer/polyethylene glycol（PEG） dual-soft segments energetic polyurethane elastomer was synthesized.The elastomer was characterized with Fourier transform infrared spectrum（FT-IR）,differential scanning calorimetry（DSC） and other means.The experimental results show that： When PEG is introduced into the elastomer,tensile strength of elastomer increases 168%,extension rate of elastomer increases 77%.Due to molecular weight of PEG soft segment is low,elastomer showes Tg of GAP soft segment only,with the content of crosslinker increasing,Tg of GAP soft segment raises from-36.85 ℃ to34.81 ℃ and then drops to-40.31 ℃.The thermal decomposition behavior of elastomer can be divided into two sections,and the initial decomposition temperature is 183 ℃.