Simultaneous Thermal Analysis Apparatus

在拜罗伊特大学陶瓷材料系进行的几乎所有正在进行和计划进行的研究活动都包括对有机和陶瓷前体，特别是硅基聚合物的热解行为的研究。特别是，根据温度和气氛的不同，交联和热解行为的表征以及陶瓷产率的确定是最令人感兴趣的。结合气体化合物分解的性质和量的确切知识，可以全面阐明交联和热解过程中发生的过程。这种知识反过来允许有针对性地和定制地合成新的或改性的市售聚合物和所得的陶瓷或碳，用于特殊应用，例如陶瓷纤维复合材料、陶瓷纤维、聚合物和陶瓷涂层的基质，或作为用于加工单片陶瓷的各种颗粒的粘合剂。为了满足所需分析的复杂要求，所需的热天平（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的分解或氧化过程。除了基本功能如差热分析（DSC）和在热解过程中测定质量平衡以及在高达1600 ° C的温度下的陶瓷或碳产率之外，该设备还应特别允许通过红外和质谱对裂解气体进行补充分析。这种组合允许分析在交联、热解和氧化反应期间释放的IR活性和IR非活性气体。首先，由于有机聚合物在热解过程中在非常窄的温度范围内分解出大量的气体混合物，因此重要的是这些混合物可以通过气相色谱法分离和分析。此外，较大量气体的释放应允许具有热天平的气相色谱的反馈，以中断TG的温度上升并减缓气体释放。因此，设置适当的阈值也将允许对更大量的气体进行气体分离和分析。拜罗伊特大学没有TG / DSC装置的这种设备特征组合。TG / DSC设备是陶瓷材料主席开展的几乎所有项目所需的设备，在所有设备中利用率最高。因此，提供了一个最多可容纳20个样品的自动进样器，因此可以在工作时间之外测量样品，并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