Q系列热重分析仪

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。

Manufactures have been listening. In growing numbers, they have been hearing the rising voices of dissatisfied customers, outspoken consumer advocates, government watchdogs, and litigious lawyers. The message: The public wants products that work, that last a reasonable length of time, and that are safe to use.?

近年来，应用热重法测定材料在不同温度下的饱和蒸汽压已经得到了非常广泛的关注与研究。本文通过采用TA仪器的Q5000IR型号TGA进行了一系列实验摸索，得到了非常理想的测试结果，初步验证了热重法简单快捷测定饱和蒸汽压的可行性，并确立了最佳实验条件。

五种热分析技术（DSC，调制DSC，TMA，DMA及DEA）是用来描述非晶形聚合物的玻璃化转变温度（Tg）的。每一种热分析技术都用在检测基于玻璃化转变过程中不同材料特性改变的Tg。因此，不同技术检测Tg的相对灵敏度取决于材料的性质以及作为实验变量，如加热速率等。本次研究比较了采用五种常见的热技术检测典型的无定形热塑性材料得到的Tg信息。结果表明可能出现的问题的类型。

The amount of moisture in pharmaceutical formulations is an important quality control parameter because it can affect their long-term stability and ultimate effectiveness as well as short-term processability. Techniques such as Karl Fischer titration, moisture evolution analysis (1,2), and thermogravimetric analysis (TGA) have been used for determining pharmaceutical moisture levels. However, these techniques often have trouble differentiating between “free” surface water (the source of problems) and bound water present in the chemical formulation.