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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：复合推进剂和炸药中TTS流变仪和力学性能测试的评估与相关性比较

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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：粘弹性材料的表征近来变得非常重要，因为由于它们的机械性能，其可加工性很复杂。时间-温度叠加（TTS）原理是评估粘弹性材料性能的重要概念。该原理用于通过使用时间-温度当量来生成粘弹性聚合物的主曲线。最近的研究中主要使用了两种技术。最常见的表征是机械测试，第二种方法是动态力学​​分析（DMA）。与耗时且昂贵的机械测试相比，使用DMA进行的测试更快，更可重复且更容易。在这项研究中，主要选择含高氯酸铵（65-70％）的HTPB（10-15％）火箭推进剂，并通过机械测试和流变仪估算其主曲线。针对STANAG 4507进行了机械测试和数据评估。流变仪在张力模式下与双梁悬臂装置一起使用，并进行了方法优化。在进行流变仪测试以比较这两种方法之后，将恒定因子应用于所有模量数据。在包含HTPB，IPDI和燃烧速率调节剂的第一类推进剂中，系数计算为0.4。在包含HTPB，DDI和Al的第二种推进剂中，系数分类为0.27。在具有HMX和IPDI的炸药样品中，相关系数为0.35。在比较这两种方法时，变化可能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，在流变仪和力学测试结果之间建立了水平时间轴的叠加。

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