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首页> 美国卫生研究院文献>Polymers >Reactive Energetic Plasticizers Utilizing Cu-Free Azide-Alkyne 13-Dipolar Cycloaddition for In-Situ Preparation of Poly(THF-co-GAP)-Based Polyurethane Energetic Binders
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Reactive Energetic Plasticizers Utilizing Cu-Free Azide-Alkyne 13-Dipolar Cycloaddition for In-Situ Preparation of Poly(THF-co-GAP)-Based Polyurethane Energetic Binders

机译：利用无铜叠氮化物-炔烃13-偶极环加成反应活性高能增塑剂原位制备聚（THF-co-GAP）基聚氨酯高能粘合剂

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Reactive energetic plasticizers (REPs) coupled with hydroxy-telechelic poly(glycidyl azide-co-tetrahydrofuran) (PGT)-based energetic polyurethane (PU) binders for use in solid propellants and plastic-bonded explosives (PBXs) were investigated. The generation of gem-dinitro REPs along with a terminal alkyne stemmed from a series of finely designed approaches to not only satisfy common demands as conventional energetic plasticizers, but also to prevent the migration of plasticizers. The miscibility and rheological behavior of a binary mixture of PGT/REP with various REP fractions were quantitatively determined by differential scanning calorimetry (DSC) and rheometer, respectively, highlighting the promising performance of REPs in the formulation process. The kinetics on the distinct reactivity of propargyl vs. 3-butynyl species of REPs towards the azide group of the PGT prepolymer in terms of Cu-free azide-alkyne 1,3-dipolar cycloaddition (1,3-DPCA) was studied by monitoring 1H nuclear magnetic resonance spectroscopy and analyzing the activation energies (Ea) obtained using DSC. The thermal stability of the finally cured energetic binders with the incorporation of REPs indicated that the thermal stability of the REP/PGT-based PUs was maintained independently of the REP content. The tensile strength and modulus of the PUs increased with an increase in the REP content. In addition, the energetic performance and sensitivity of REP and REP triazole species was predicted.
机译：研究了用于固体推进剂和塑料粘结炸药（PBX）的基于反应性的高能增塑剂（REPs）与羟基telechelic聚（缩水甘油叠氮化物-四氢呋喃共聚物）（PGT）基高能聚氨酯（PU）粘合剂的结合。宝石二硝基REP和末端炔烃的产生源于一系列精心设计的方法，这些方法不仅可以满足常规的高能增塑剂的常见要求，而且可以防止增塑剂的迁移。通过差示扫描量热法（DSC）和流变仪分别定量确定了具有不同REP馏分的PGT / REP二元混合物的混溶性和流变行为，突出了REPs在配制过程中的前景广阔。根据无铜叠氮化物-炔烃1,3-偶极环加成（1,3-DPCA），研究了炔丙基对3-丁炔基种类的REPs对PGT预聚物叠氮基团独特反应性的动力学。 1 H核磁共振波谱学并分析使用DSC获得的活化能（Ea）。掺有REP的最终固化的含能粘合剂的热稳定性表明，与REP含量无关地保持了基于REP / PGT的PU的热稳定性。 PU的拉伸强度和模量随REP含量的增加而增加。此外，还预测了REP和REP三唑类物质的能量性能和敏感性。

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