- Quality control for detecting contaminants:
Each material has its own characteristic DSC curve. If something doesn’t match… it’s likely that unwanted contaminants are present. - Quality control for curing paints or adhesives:
If the curing conditions were not adequate, part of the material may remain uncured, which becomes evident in a DSC curve. - Quality control in injection molding:
During plastic injection, a polymerization process takes place which, if not completed, can be detected in the DSC curve. In this project you can see a real case we had to solve related to an injection molding issue. - Chemical reactions:
DSC can determine whether chemical reactions are exothermic or endothermic, as well as quantify the amount of energy absorbed or released.
What does Differential Scanning Calorimetry (DSC) measure?
At ATRIA we use Differential Scanning Calorimetry (DSC) in many of our projects. It’s one of those techniques that may sound complex, but it provides essential information: understanding the thermal behavior of a material and the temperatures at which its properties change.
And this is essential. If a material is going to operate near a heat source, in a process involving extreme cold, or simply in the everyday use of a product, we need to know when it changes, how it changes, and why it changes. This is especially critical in plastics, which have relatively low melting and softening temperatures.
Let’s take a simple example: if we want to manufacture a plastic container to heat water in the microwave, we need to know its melting temperature to ensure that, when we take it out, it’s still a container… and not an abstract sculpture.
DSC allows us to anticipate all of that.
How does Differential Scanning Calorimetry (DSC) work?
DSC, short for Differential Scanning Calorimetry, is based on measuring the heat a material absorbs or releases as its temperature changes. In other words, it measures the heat flow.
To do this accurately, a reference sample is always needed—the key is comparison. By evaluating the thermal behavior difference between the sample and the reference, we can obtain the material’s enthalpy.
DSC equipment can heat materials to high temperatures and also cool them below 0 °C. This makes it suitable for plastics, ceramics, metals, and more.
How is a Differential Scanning Calorimetry (DSC) measurement performed?
As we mentioned, DSC works with two cells: one for the sample and one for the reference. The equipment continuously records the differences in heat flow between them as the temperature changes.
Depending on the information we want to obtain, we can perform different types of tests:
- Constant-rate temperature ramp (heating/cooling scan):
The most common type. It is used for both heating and cooling temperature curves, and allows us to determine melting, crystallization, curing temperatures, and more. - Isothermal mode:
The simplest mode. The sample is kept at a fixed temperature to study slow processes such as desorption, drying, or certain chemical reactions that require more time..
What parameters can be measured with Differential Scanning Calorimetry (DSC)?
DSC provides a great deal of information. Some of the most useful parameters we can obtain are:
- Melting temperature:
Indicates the phase change during heating. The equipment detects it as a clear endothermic peak. Its “sister,” solidification, appears as an exothermic peak. - Crystallization temperature :
Lower than the melting temperature, it corresponds to the onset of crystallization. It is especially relevant in polymers. - Glass transition temperature (Tg):
The point at which the material stops behaving as a rigid solid and becomes more “rubbery.” Essential in polymers and glasses. - Curing of paints, adhesives, or coatings:
By comparing multiple DSC curves (for example, two heating cycles), we can determine whether a material has fully cured or still needs more “cooking.”
Applications of Differential Scanning Calorimetry (DSC)
DSC has applications in practically every sector: automotive, electronics, food, consumer goods, construction…
Some of the most common applications include:
Our Differential Scanning Calorimetry (DSC) analysis service
At ATRIA, we offer DSC analysis both for quality control and for the development of new materials. It is a fast, precise, and extremely useful tool for understanding how a component behaves when its temperature changes.
Our most requested services are:
- Determination of root causes of component failures:
We analyze parts using Differential Scanning Calorimetry (DSC), comparing defective components with correct ones to identify the root cause of the failure. In this case, we solved an issue of poor paint adhesion caused by incomplete polymerization of the base polymer. - Determination of thermal properties:
We study new materials through DSC analysis, obtaining several of their most important thermal properties.
Advantages and limitations of Differential Scanning Calorimetry (DSC)
Like any technique, DSC has its strengths and weaknesses:
Advantages
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Provides highly detailed information about the physicochemical changes in a material.
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Ideal for quality control processes.
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Precise and reproducible results.
Limitations
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Sensitive to initial sample conditions (humidity, composition, etc.).
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Results depend on the heating/cooling rate.
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Requires strong technical expertise for proper interpretation.
Do you want to perform Differential Scanning Calorimetry (DSC) analysis in any of your projects? Contact us!
