Abstract The 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)-based polymer bonded explosives (PBXs) modified with different contents of graphene from 0.05 wt% to 0.5 wt% were prepared by the water suspension methods. The non-linear viscoelastic properties of the TATB-based PBXs were detailedly investigated. The experimental results indicated that with the incorporation of only a small amount of graphene, the storage modulus, the static mechanical properties, and creep resistance in the nanocomposites were effectively improved. A rigid filler effect and the strong sheet/polymer matrix interfacial interaction to restrict the mobility of polymer chains played an important role in the enhanced non-linear viscoelastic behaviors of nanostructured materials. The formation mechanisms were further interpreted based on the modeling of the creep behavior using a six-element mechanical model. The modeling results demonstrated that the introduction of the graphene into the TATB-based PBXs was an effective and fundamental method to enhance the elastic modulus of high elastic deformation and restrain the irrecoverable deformation of the materials. The long-term creep behaviors predicted using the time-temperature superposition principle revealed that PBXs with 0.15 wt% graphene exhibited a lowest long-term creep strain.

中文翻译：

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石墨烯填充纳米结构聚合物粘结炸药的构建及非线性粘弹性能

摘要 采用水悬浮法制备了0.05-0.5wt%不同石墨烯含量改性的1,3,5-三氨基-2,4,6-三硝基苯(TATB)基聚合物粘结炸药(PBXs)。详细研究了基于 TATB 的 PBX 的非线性粘弹性。实验结果表明，仅掺入少量石墨烯，纳米复合材料的储能模量、静态力学性能和抗蠕变性均得到有效提高。刚性填料效应和强片/聚合物基体界面相互作用限制聚合物链的移动性在纳米结构材料增强的非线性粘弹性行为中发挥了重要作用。基于使用六元素力学模型对蠕变行为进行建模，进一步解释了形成机制。建模结果表明，将石墨烯引入基于 TATB 的 PBX 是提高高弹性变形的弹性模量和抑制材料不可恢复变形的有效和基本方法。使用时间-温度叠加原理预测的长期蠕变行为表明，含有 0.15 wt% 石墨烯的 PBX 表现出最低的长期蠕变应变。