Dynalene can perform melting and freezing point analysis for liquid and solid materials that melt anywhere between -100°C and 1000°C. We have various instruments that we use to determine melting point, depending on what type of material you have.
Differential Scanning Calorimetry (DSC)
One method that we most commonly use to measure melting point for our customers is differential scanning calorimetry, or DSC. This method only requires about 5 mg to 20 mg of sample, and provides very accurate melting, freezing, and phase transition information between -80°C and 500°C.
Our differential scanning calorimeter measures these thermal transitions by measuring the amount of heat it takes to raise the temperature of a sample vs a reference. One sample pan is filled with the sample and placed in the cell. Another pan (empty) is also placed in the cell. Several precise temperature probes are placed throughout the cell and heat flow and temperature are measured.
After determining how much heat it takes to raise the temperature of the pan containing the sample (and how much heat is absorbed into the sample), the reference pan is subtracted and the melting/freezing/phase transition points of just the sample can be identified. The thermal behavior of the sample can be viewed as a function of time or temperature, and makes it easy to identify phase transitions, endothermic/exothermic reactions, crystallization kinetics, and other thermal phenomena.
For samples that may not be compatibility with our DSC, we use custom methods to determine the melting/freezing point. We have various custom heating and cooling systems that can identify the melting/freezing temperatures between -80°C and 1000°C. With these systems, it uses variations of optical and temperature vs time plots to calculate the melting/freezing points. Please give us a call to discuss if your material is compatible with our DSC, or if you need a custom method!