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The dependence of the non-linear creep properties for TATB-based polymer bonded explosives on the molecular structure of polymer binder

机译：非线性蠕变特性对聚合物粘合剂分子结构的基于TATB的聚合物键合炸药的依赖性

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摘要

The influences of molecular structure of polymer binders on the mechanical properties and non-linear time dependent creep of the 1,3,5-triamino-2,4,6-trinitrobenzene (TATB)-based polymer bonded explosives (PBXs) at different temperatures and stresses were investigated. A copolymer of chlorotrifluoroethylene and vinylidene fluoride (PF1) and a copolymer of chlorotrifluoroethylene, vinylidene fluoride, tetrafluoroethylene, and hexafluoropropylene (PF2) were used as polymer binders. An increase of the storage modulus and glass transition temperature was observed for PF2, compared to that of PF1. The compressive and tensile properties of TATB-based PBX with PF2 were higher than the one with PF1 at both ambient temperature and elevated temperature. The creep resistance also showed clear dependence on the molecular structure of polymer binders. It was found that the incorporation of tetrafluoroethylene and hexafluoropropylene comonomers in PF2 resulted in a decrease of the constant creep strain rate and the maximal creep strain values and an increase of creep rupture time for TATBbased PBX. Non-linearity in the creep response was modeled using the six-element mechanical model. The predicted theoretical results coincided quite well with the experimental data. Compared with the formulation containing PF1 as binder, an increase in the elastic modulus E-2, E-3 and bulk viscosity eta(4) was observed for TATB-based PBX with PF2 under the same conditions. Three-point bending master curves of creep strain were constructed using a time-temperature superposition (TTS) concept. The formulation with PF2 showed consistently lower creep strain than the formulation with PF1 in the entire time scale.
机译：聚合物粘合剂的分子结构对不同温度的1,3,5-三氨基-2,4,6-三硝基苯（TATB）基础聚合物键合爆炸物（PBX）的机械性能和非线性时间依赖性蠕变的影响并调查了胁迫。用作聚合物粘合剂，使用氯三氟乙烯和偏二氟乙烯（PF1）和氯二乙烯，四氟丙烯和六氟丙烯（PF2）的共聚物。与PF1的PF 2相比，对PF2观察到储存模量和玻璃化转变温度的增加。用PF2的基于TATB的PBX的压缩和拉伸性能高于环境温度和升高的PF1。抗蠕变性也显示出明显依赖聚合物粘合剂的分子结构。发现在PF 2中掺入掺氟乙烯和六氟丙烯共聚单体导致恒定蠕变应变速率和最大蠕变应变值的降低以及TATBASED PBX的蠕变破裂时间的增加。使用六元机械模型建模蠕变响应中的非线性。预测的理论结果与实验数据相当吻合。与含有PF1作为粘合剂的配方相比，在相同条件下，在相同条件下，在具有PF2的基于TATB的PBX中观察到弹性模量E-2，E-3和本体粘度ETA（4）的增加。使用时间温度叠加（TTS）概念构建蠕变菌株的三点弯曲主曲线。具有PF2的配方显示在整个时间尺度中具有PF1的配方始终较低的蠕变应变。

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  • 来源
    《RSC Advances》 |2015年第39期|共10页
  • 作者

    Lin Congmei; Liu Shijun; Huang Zhong; He Guansong; Gong Feiyan; Liu Yonggang; Liu Jiahui;

  • 作者单位

    China Acad Engn Phys Inst Chem Mat Mianyang 621900 Sichuan Peoples R China;

    China Acad Engn Phys Inst Chem Mat Mianyang 621900 Sichuan Peoples R China;

    China Acad Engn Phys Inst Chem Mat Mianyang 621900 Sichuan Peoples R China;

    China Acad Engn Phys Inst Chem Mat Mianyang 621900 Sichuan Peoples R China;

    China Acad Engn Phys Inst Chem Mat Mianyang 621900 Sichuan Peoples R China;

    China Acad Engn Phys Inst Chem Mat Mianyang 621900 Sichuan Peoples R China;

    China Acad Engn Phys Inst Chem Mat Mianyang 621900 Sichuan Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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