In this research to improve the thermal and mechanical properties of polyglycidyl nitrate (PGN)-based energetic polyurethane network was used a novel flexible chain triblock copolymer based on polypropylene glycol–poly glycidyl nitrate–polypropylene glycol (PPG–PGN–PPG). Energetic polyurethane was prepared by curing of the triblock copolymer with different curing agents (TDI, IPDI, N100, IPDI/N100) and different NCO/OH ratios. To evaluate the effect of plasticizer on the thermo-mechanical properties of the polyurethane, the compatibility of copolymer with three energetic plasticizers, including n‐butyl nitroxyethyl nitramine (BuNENA), trimethylol ethane trinitrate (TMETN), and 1,2,4-butanetriol trinitrate (BTTN) was studied using the swelling test and thermal analysis. The results indicate that BuNENA is more compatible with this copolymer than other plasticizers. The mechanical properties effect of the BuNENA plasticizer on the polyurethane network was investigated using dynamic mechanical analysis as well as the tensile test. The IPDI/N100 curing agents-polyurethane mixture, demonstrated appropriate mechanical properties (0.35 MPa stress and 70% elongation) that make it a suitable binder system comparison with pure PGN (unstable and de-cured). Also the mechanical properties of the prepared polyurethane containing 15 wt% BuNENA showed 0.17 MPa stress and 98% elongation.

中文翻译：

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基于 PPG-PGN-PPG 的新型聚氨酯网络的制备：增塑剂对其性能影响的研究

在这项研究中，为了提高聚硝酸缩水甘油酯 (PGN) 基含能聚氨酯网络的热性能和机械性能，使用了一种基于聚丙二醇-聚硝酸缩水甘油酯-聚丙二醇 (PPG-PGN-PPG) 的新型柔性链三嵌段共聚物。通过使用不同的固化剂（TDI、IPDI、N100、IPDI/N100）和不同的 NCO/OH 比率固化三嵌段共聚物，制备了高能聚氨酯。为了评估增塑剂对聚氨酯热机械性能的影响，共聚物与三种含能增塑剂的相容性，包括正丁基硝基乙基硝胺 (BuNENA)、三羟甲基乙烷三硝酸酯 (TMETN) 和 1,2,4-丁三醇使用溶胀试验和热分析研究硝酸三盐 (BTTN)。结果表明，与其他增塑剂相比，BuNENA 与该共聚物的相容性更高。使用动态力学分析和拉伸试验研究了 BuNENA 增塑剂对聚氨酯网络的力学性能影响。IPDI/N100 固化剂-聚氨酯混合物表现出适当的机械性能（0.35 MPa 应力和 70% 伸长率），使其成为与纯 PGN（不稳定和脱固化）相比的合适粘合剂系统。所制备的含有 15 wt% BuNENA 的聚氨酯的机械性能显示出 0.17 MPa 的应力和 98% 的伸长率。展示了适当的机械性能（0.35 MPa 应力和 70% 伸长率），使其成为与纯 PGN（不稳定和脱固化）相比的合适粘合剂系统。所制备的含有 15 wt% BuNENA 的聚氨酯的机械性能显示出 0.17 MPa 的应力和 98% 的伸长率。展示了适当的机械性能（0.35 MPa 应力和 70% 伸长率），使其成为与纯 PGN（不稳定和脱固化）相比的合适粘合剂系统。所制备的含有 15 wt% BuNENA 的聚氨酯的机械性能显示出 0.17 MPa 的应力和 98% 的伸长率。