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首页> 外文会议>North American Thermal Analysis Society conference >COMPARISON OF RHEOMETER AND MECHANICAL TESTING BY TTS EVALUATION AND CORRELATION IN COMPOSITE PROPELLANTS AND EXPLOSIVES
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COMPARISON OF RHEOMETER AND MECHANICAL TESTING BY TTS EVALUATION AND CORRELATION IN COMPOSITE PROPELLANTS AND EXPLOSIVES

机译：TTS评价与爆炸物中TTS评价与相关性的流变仪和机械测试的比较

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Characterization of viscoelastic materials gained significant importance recently since their processability is complex due to mechanical properties they perform. Time -temperature superposition (TTS) principle is an important concept to estimate the behavior of viscoelastic materials. This principle is used to generate master curves for viscoelastic polymers by using time - temperature equivalence. There were mainly two techniques used in recent studies. The most common characterization is mechanical testing and second way is dynamic mechanical analysis (DMA). Testing with DMA is faster, more repeatable and easier than time consuming and expensive mechanical testing. In this study, mostly HTPB (10-15%) based rocket propellants containing ammonium perchlorate (65-70%) were chosen and its master curves were estimated both with mechanical tests and rheometer. Mechanical tests and data evaluations were carried out with respect to STANAG 4507. Rheometer was used in tension mode with dual beam cantilever apparatus and method optimization was performed. After rheometer tests were done to compare both methods, a constant factor was applied to all modulus data. In first kind of propellant, which contained HTPB, IPDI and burning rate modifier, the coefficient was calculated as 0.4. In second type of propellant, which contained HTPB, DDI and Al, the coefficient was classified as 0.27. In the explosive sample with HMX and IPDI, the correlation factor was found as 0.35. While comparing these two methods, variations may originate from different strain values used in both techniques. However; by dual cantilever beam apparatus, the overlay in horizontal time axis was established between rheometer and mechanical test results.
机译：粘弹性材料的表征最近获得了显着的重要性，因为它们由于它们的机械性能而复杂。时间 - 高温叠加（TTS）原则是估计粘弹性材料行为的重要概念。该原理用于通过使用时间温度等效产生粘弹性聚合物的主曲线。主要有两种技术在最近的研究中使用过。最常见的表征是机械测试，第二种方式是动态机械分析（DMA）。使用DMA进行测试比耗时和昂贵的机械测试更快，更可重复和更容易。在该研究中，主要选择含有高氯酸铵（65-70％）的基于HTPB（10-15％）的火箭推进剂，并且估计机械测试和流变仪估计其主曲线。关于Stanag 4507进行机械测试和数据评估。利用双束悬臂装置，测量流变仪进行张力模式，并进行方法优化。完成流变仪测试以比较两种方法后，将恒定因子应用于所有模数数据。在含有HTPB，IPDI和燃烧速率改性的第一种推进剂中，将系数计算为0.4。在第二种类型的推进剂中，其含有HTPB，DDI和Al，系数被分类为0.27。在具有HMX和IPDI的爆炸样品中，相关因子被发现为0.35。在比较这两种方法的同时，变型可以源自两种技术中使用的不同应变值。然而;通过双悬臂梁装置，在流变仪和机械测试结果之间建立水平时间轴的覆盖。

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