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作 者:菅晓霞[1] 肖乐勤[1] 左海丽[1] 周伟良[1] 徐复铭[1]
出 处:《含能材料》2008年第5期614-617,共4页Chinese Journal of Energetic Materials
摘 要:以预聚端羟基叠氮缩水甘油醚(GAP)为软段、4,4′-二苯基甲烷二异氰酸酯(MDI)和1,4-丁二醇(BDO)为硬段,采用熔融预聚二步法合成了一种高能低敏感发射药使用的含能热塑性聚氨酯弹性体(ETPE)。确定了反应时间为2 h,熟化时间为3 d。采用红外光谱(FT-IR)、热重分析(TG)、差示扫描量热(DSC)、力学性能测试、动态热机械分析(DMA)等分析测试技术对ETPE的性能进行了表征。结果表明,当—NCO/—OH物质的量比(R值)为0.98,硬段质量百分含量为40%时,热塑性弹性体的抗拉强度为6.12 MPa,延伸率为71%;在所得ETPE中添加含能增塑剂双(2,2-二硝基丙基)缩甲醛/缩乙醛(BDNPF/A)后,延伸率有所下降。Using prepolymerized glycidyl azide polymer (GAP) as soft segments,4,4'-diphenylmethane diisocyanate (MDI) and 1,4-butanediol(BDO) as hard segments for the purpose of insensitive high energy propellants, an energetic thermoplastic elastomer (ETPE) was synthesiacd by melt-prepolymerization, and was characterized by FTIR,TG, tensile strength test and DMA. The results show that the reaction time and aging time for ETPE synthesization are 2 h and 3 d respectively. And the tensile strength (δ) of the ETPE is 6.12 MPa,and the elongation(ε) is 71% when hard segment is 40% in weight and the mole ratio of-NCO to -OH (R) is 0.98. After adding plasticizer BDNPF/A( A3 ) in the ETPE,δ is invariability,but the elongation decreases.
关 键 词:有机高分子材料 端羟基叠氮缩水甘油醚(GAP) 发射药 热塑性弹性体
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