方案摘要
方案下载| 应用领域 | 石油/化工 |
| 检测样本 | 其他 |
| 检测项目 | |
| 参考标准 | 暂无 |
本文运用热分析分析热塑性材料的物理性质。热分析是一系列的传统测量技术用于确定材料特性随温度的变化的技术。对两个工程热塑性塑料的短期和长期的物理性质研究的实验结果表明，热分析对描述热塑性材料的物理性质很有家价值。
Thermal Analysis is the generic name for a series of measurement techniques traditionally used to determine changes in material properties with temperature. Common thermal analysis techniques include:
- Differential Scanning Calorimetry (DSC) - is the most widely used thermal analysis technique. DSC measures the heat flow in materials and provides information about phase changes (amorphous and crystalline transitions) as well as chemical changes (degradation and reactions).
- Thermogravimetric Analysis (TGA) - measures weight changes associated with thermal events. While TGA is most commonly used to determine compositional analysis, it is also valuable for determining thermal stability. Furthermore, by analyzing multiple TGA curves obtained under different heating rates, it is possible to predict long-term as well as short-term thermal stability.
- Dynamic Mechanical Analysis (DMA) - measures the storage or elastic modulus and the loss or viscous modulus of materials subjected to sinusoidal or static stresses.
- Dielectric Analysis (DEA) - is the electrical analog of DMA in which the current (phase and magnitude) resulting from a sinusoidally imposed voltage are measured. Because mechanical and electrical properties are highly sensitive to small changes in material internal structures, DMA and DEA are more sensitive to low energy transitions, such as the glass transitions of filled epoxy systems, than are other thermal analysis methods. The static stress modes of the DMA further allow long term strength forecasts to be made using the creep or stress relaxation methods at elevated temperatures.
In this paper, the short-term and long-term physical properties of two engineering thermoplastics are explored. The results illustrate the value of thermal analysis for characterizing thermoplastic materials.
利用微量热技术研究病毒结构与宿主细胞受体结合反应
等温量热法研究水泥水化
等温微量热法研究生物制品长时间稳定性评价
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