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首页> 外文期刊>Journal of Applied Polymer Science >Investigation of acetyl ferrocene migration from hydroxyl-terminated polybutadiene based elastomers by means of ultraviolet-visible and atomic absorption spectroscopic techniques
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Investigation of acetyl ferrocene migration from hydroxyl-terminated polybutadiene based elastomers by means of ultraviolet-visible and atomic absorption spectroscopic techniques

机译：紫外可见和原子吸收光谱技术研究羟基末端聚丁二烯基弹性体中乙酰基二茂铁的迁移

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Migration and leakage of some mobile components in rocket propellant produces an inhomogeneous composition region at which migration takes place, which can lead to premature detonation, changes in ballistic characteristics, and so on. It is, therefore, important to be able to predict the behavior of low-molecular-weight mobile additives and to control the leakage of them from the propellant. At this point, our chief interest was to study the magnitude of the migration and to understand the factors that influence the migration process. In this study, the migration of a ferrocene-based burning-rate catalyst [acetyl ferrocene (AcF)] a from hydroxyl-terminated polybutadiene (HTPB) based elastomer in the presence of a plasticizer (dioctyl adipate) was examined in accelerated aging conditions at 60 degrees C for various time intervals. We also tried to minimize the migration of AcF from the loaded to the unloaded part by using an extra barrier layer consisting of polyfunctional aziridine (AST D45+) in addition to the HTPB-toluene diisocyanate composition. The migration enhanced with aging of the AcF and the barrier effects of the layer with intensified crosslink density to this migration were studied extensively. The migration was monitored by both ultraviolet-visible and atomic absorption spectroscopy (AAS) methods. A comparison of the data obtained from both of these methods was also done. The two techniques were found to be in agreement, and the Fe determinations from both methods were highly correlated, suggesting that the data were reliable, although the AAS data were found to be symmetrically somewhat higher. (c) 2005 Wiley Periodicals, Inc.
机译：火箭推进剂中某些活动成分的迁移和泄漏会在不均匀的成分区域发生迁移，这可能导致过早爆炸，弹道特性发生变化等。因此，重要的是能够预测低分子量移动添加剂的行为并控制它们从推进剂中的泄漏。在这一点上，我们的主要兴趣是研究迁移的规模并了解影响迁移过程的因素。在这项研究中，在增塑剂（己二酸二辛酯）存在下，研究了二茂铁基燃烧速率催化剂[乙酰基二茂铁（AcF）] a在增塑剂（己二酸二辛酯）存在下从端羟基聚丁二烯（HTPB）弹性体中的迁移。各种时间间隔为60摄氏度。我们还尝试通过使用除HTPB-甲苯二异氰酸酯组合物外还由多官能氮丙啶（AST D45 +）组成的额外阻隔层，来最大程度地减少AcF从加载部分到未加载部分的迁移。随AcF的老化而增加的迁移和广泛研究了交联密度增加的层对该迁移的阻挡作用。通过紫外可见光谱和原子吸收光谱法（AAS）监测迁移。还比较了从这两种方法获得的数据。发现这两种技术是一致的，并且两种方法中的铁含量测定都高度相关，这表明数据是可靠的，尽管发现AAS数据对称性更高。 （c）2005年Wiley Periodicals，Inc.

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