DSC-600 Differential Scanning Calorimeter
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Description
Product Introduction:
Differential scanning calorimetry (DSC) is a widely used technique. DSC instruments serve both as routine quality‑testing tools and as research instruments, measuring the relationship between temperature and heat flow associated with thermal transitions within a material. Our company’s instruments are heat‑flow DSC systems, characterized by excellent reproducibility and high accuracy, making them particularly well suited for precise specific‑heat measurements. These devices are easy to calibrate, simple to operate, fast and reliable, and have a broad range of applications—especially in materials research and development, performance evaluation, and quality control. Key material properties such as glass transition temperature, cold crystallization, phase transitions, melting, crystallization, product stability, curing/crosslinking, and oxidation induction time are all within the scope of DSC analysis. We offer a variety of DSC models, allowing customers to select the most appropriate instrument based on their experimental parameters and requirements.
The applications of differential scanning calorimetry include determining the curing reaction temperature and thermal effects of polymeric materials, measuring phase transition temperatures and their associated thermal effects, assessing the crystallization and melting temperatures of polymers along with their thermal effects, and evaluating the glass transition temperature of polymeric materials. Different instrument models are suited to measuring distinct parameters.
The sample and the reference material are placed separately into crucibles and subjected to programmed heating in a furnace, with their temperatures systematically varied. If the reference material and the sample have identical heat capacities and the sample exhibits no thermal effects, the temperature difference between them will be nearly zero, yielding a smooth baseline. As the temperature rises, if the sample undergoes a thermal effect while the reference remains unaffected, a temperature difference arises, which appears as a peak on the DSC curve. The larger the temperature difference, the more pronounced the peak; likewise, the greater the number of temperature‑difference transitions, the more peaks will be observed. Peaks whose maxima point upward are designated as exothermic, whereas those whose maxima point downward are classified as endothermic.
Instrument Features
1. A completely new furnace design, offering improved resolution and baseline stability;
2. Gas flow meter for precise control of the purge gas flow, with data directly recorded in the database;
3. The instrument supports bidirectional control (host‑side control and software‑based control), with real-time data transmission from the device’s lower-level controller, a user‑friendly interface, and straightforward operation.
Technical specifications:
| Technical Category | Technical Content |
| DSC range | 0 to ±600 mW |
| Temperature range | Room temperature to 600°C |
| Heating rate | 0.1~100℃/min |
| Temperature accuracy | 0.01℃ |
| Temperature fluctuations | ±0.01℃ |
| Temperature repeatability | ±0.1℃ |
| DSC sensitivity | 0.001mW |
| DSC resolution | 0.01uW |
| Power supply | AC 220V/50Hz or custom-made |
| Temperature control method | Heating and constant-temperature control (fully automated throughout the entire process) |
| Program control | It supports six-stage temperature‑rise and constant‑temperature control, with customizable special parameters. |
| Curve scanning | Heating scan |
| Atmosphere control | Automatic switching between two channels (instrument‑automated switching) |
Instrument Principle
During both physical and chemical changes, substances often exhibit thermal effects; the release or absorption of heat reflects changes in the substance’s enthalpy. A differential scanning calorimeter measures, under identical heating conditions, the temperature difference between a sample and a reference material as a function of temperature or time. Differential scanning calorimetry is a technique that, under programmed temperature control, determines the relationship between the power difference between the sample and the reference and the temperature. Our instruments are heat‑flow type differential scanning calorimeters, with the vertical axis representing the heat‑flow difference between the sample and the reference, expressed in milliwatts (mW), and the horizontal axis indicating time (t) or temperature (T), increasing from left to right (any deviation from this convention must be clearly noted). After placing the sample and the reference material into their respective crucibles, the system is heated at a specified rate; if the sample and the reference have approximately equal heat capacities, an ideal differential scanning calorimetric curve can be obtained.
In the figure, T represents the temperature curve recorded by the thermocouple inserted into the reference material. The line AH shows the temperature‑difference curve between the sample and the reference. If no thermal effect occurs in the sample, the temperature difference ΔT between the sample and the reference is zero, yielding a smooth baseline such as that observed between points A–B, D–E, and G–H on the curve. When a thermal effect causes the sample’s temperature to be lower than that of the reference, an endothermic peak appears, with its maximum pointing downward, as seen between B–C–D. Conversely, if the sample’s temperature exceeds that of the reference, an exothermic peak emerges, with its maximum pointing upward, as in the E–F–G region. The number, position, area, direction, height, width, and symmetry of the peaks in the figure reflect the number of physical and chemical transformations occurring in the sample within the measured temperature range, the temperature intervals over which these transitions take place, and the magnitude and sign of the associated thermal effects. In addition to being influenced by the experimental conditions, the peak height, width, and symmetry also depend on kinetic factors governing the sample’s transformation process; consequently, the observed results are far more complex than those predicted by an idealized curve.
Precautions and Operating Procedures for Differential Scanning Calorimetry |
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| Instrument Name | Differential Scanning Calorimeter | |
| Instrument model | DSC-600 | |
| Manufacturer | Leibote (Tianjin) Testing Machine Co., Ltd. | |
| Service Hotline | 151-0221-1717 | |
| Operating Guide | ||
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