Simultaneous Thermal Analysis Apparatus

拜罗伊特大学陶瓷材料教席开展的几乎所有正在进行和计划中的研究活动都包括对有机和陶瓷前驱体，特别是硅基聚合物的热解行为的调查。特别是，对交联和热解行为的表征以及对陶瓷产率的测定，取决于温度和气氛，是最令人感兴趣的。结合对分离出的气态化合物的性质和数量的准确了解，有可能全面地阐明在交联和热解过程中发生的过程。这一知识反过来又允许有针对性地和量身定做地合成新的或改性的商业可获得的聚合物和所得到的陶瓷或碳，用于特殊应用，例如用于陶瓷纤维复合材料、陶瓷纤维、聚合物和陶瓷涂层的基质，或作为用于加工整体陶瓷的各种颗粒的粘结剂。为了满足所需分析的复杂要求，所要求的热平衡(Tg)必须提供全面的可能性，以详细阐明各种聚合物的交联和热解行为以及陶瓷材料或氧化过程的分解。除了差热分析(DSC)和测定热解过程中的质量平衡以及1600°C以下的陶瓷或碳产率等基本功能外，该设备还应特别允许通过红外和质谱仪对裂解气体进行补充分析。这种组合可以分析在交联化、热解和氧化反应过程中释放的红外活性气体和红外非活性气体。最重要的是，由于有机聚合物在很窄的温度范围内会在热解过程中分离出大量的气体混合物，因此用气相色谱方法对这些混合物进行分离和分析是很重要的。此外，大量气体的释放应该允许气相色谱与热天平的反馈，以中断Tg的温度上升，并减缓气体释放。因此，设置适当的阈值还可以对更大数量的气体进行气体分离和分析。拜罗伊特大学没有TG/DSC仪器的这种设备特征的组合。陶瓷材料教席开展的几乎所有项目都需要TG/DSC设备，而且是所有设备中利用率最高的。因此，提供了多达20个样品的自动换样器，从而可以在工作时间之外测量样品，并且可以显著提高样品吞吐量

Almost all of the running and planned research activities carried out at the Chair of Ceramic Materials of the University of Bayreuth include investigations of the pyrolysis behavior of organic and preceramic, especially of silicon-based polymers. In particular, the characterization of the crosslinking and pyrolysis behavior as well as the determination of the ceramic yield, depending on the temperature and the atmosphere, are of greatest interest. In conjunction with the exact knowledge of the nature and amount of gaseous compounds split off, it is possible to comprehensively elucidate the processes taking place during crosslinking and during pyrolysis. This knowledge in turn allows the targeted and tailor-made synthesis of new or modified commercially available polymers and the resulting ceramics or carbons for special applications such as matrices for ceramic fiber composites, ceramic fibers, polymeric and ceramic coatings or as a binder for various particles for the processing of monolithic ceramics. In order to meet the complex requirements of the required analytics, the requested thermal balance (TG) has to offer comprehensive possibilities to elucidate the crosslinking and pyrolysis behavior of a wide variety of polymers as well as the decomposition of ceramic materials or oxidation processes in detail. In addition to the basic functions such as the differential thermal analysis (DSC) and the determination of the mass balance during pyrolysis and the ceramic or the carbon yield up to temperatures of 1600 ° C, the equipment should in particular allow a complementary analysis of the cleaved gases by means of infrared and mass spectroscopy. This combination allows the analysis of both the IR-active and IR-inactive gases released during crosslinking, pyrolysis and oxidation reactions. Since, above all, organic polymers in very narrow temperature ranges split off large amounts of gas mixtures during pyrolysis, it is important that these mixtures can be separated and analyzed by means of gas chromatography. In addition, the release of larger amounts of gas should allow feedback of the gas chromatography with the thermobalance to interrupt the temperature rise of the TG and slow down the gas release. Setting appropriate thresholds would thus also allow gas separation and analysis for larger amounts of gas. This combination of equipment features of a TG / DSC apparatus is not available at the University of Bayreuth. TG / DSC equipment is required for almost all projects carried out at the Chair of Ceramic Materials and has the highest utilization rate of all equipment. Therefore, an automatic sample changer of up to 20 samples is provided, so that samples can be measured out side of working hours and the sample throughput can be significantly increased