Heat capacity analysis

Heat capacity analysis measures the amount of heat required to raise the temperature of a material by one degree Celsius . This fundamental thermal parameter provides information about a substance's energy behavior, its internal structure, and its physical transitions (melting, vitrification, crystallization, etc.).
Heat capacity is directly related to the chemical composition , morphology , and purity of the material. Its analysis is therefore essential for understanding the thermal properties and performance of products used in fields as diverse as polymer materials , food processing , cosmetics , animal nutrition , and nutraceutical formulations .

Analytical method: Differential scanning calorimetry (DSC)

Heat capacity analysis is performed using differential scanning calorimetry (DSC) , a reference technique for accurately measuring heat transfer associated with temperature changes.
The principle is based on comparing a sample with a reference subjected to the same heating program. The recorded energy variations reflect the thermal transformations of the material.

• Heat absorption (endothermic): melting, desorption, denaturation.
• Heat release (exothermic): crystallization, crosslinking, chemical reactions.

DSC analysis allows for the precise determination of:

• capacity (Cp) .
• Glass transition temperature (Tg) and melting temperature (Tm).
• Reaction or transition enthalpies
• Thermal stability and purity of the samples.

To delve deeper into the subject, also check out the DSC (Differential Scanning Calorimetry) analysis .

Matrices and application domains

The measurement of heat capacity applies to a wide variety of matrices:

• Materials and polymers : evaluation of the thermal properties of plastics, composites, resins, films or elastomers.
• Food and nutraceutical products : determination of thermal stability, phase transitions and energy behavior of powders, fats, proteins or starches.
• Cosmetic products : characterization of the melting, crystallization or stability of emulsions and lipid formulations.
• Biomaterials and packaging : study of conductivity and thermal resistance.
• Powders and plants : observation of thermal reactions in natural extracts or dry formulations.

These measures help to optimize manufacturing, formulation and storage processes, ensuring the stability and performance of finished products.

Industrial and scientific applications

Heat capacity analysis using DSC is a strategic tool in several fields:

• Quality control : verification of the thermal consistency of batches and detection of production-related anomalies.
• Development of new materials : characterization of energy and thermal performance.
• Formulation R&D : optimization of texture, stability and compatibility between components.
• Environmental and energy studies : analysis of the thermal behavior of recyclable or biodegradable materials.

In the polymer sector, this method is often coupled with thermogravimetry (TGA) to assess mass loss due to thermal degradation and determine the correlation between stability and heat capacity.

Analytical advantages

Heat capacity analysis offers numerous advantages for manufacturers:

• High accuracy in the detection of thermal transitions.
• Small sample quantity required.
• Fast, reliable and reproducible method.
• Compatible with solid, liquid or powder samples.

It constitutes a powerful predictive tool to anticipate the thermal behavior of products subjected to temperature variations during storage, transport or use.

YesWeLab's expertise

YesWeLab provides access to a network of highly qualified partner laboratories specializing in thermal and physicochemical analyses, most of which are ISO 17025 and COFRAC accredited .
Our teams support you in:

• The choice of the appropriate analytical method (linear, cyclic, isothermal heating).
• Interpretation of DSC curves and comparison of results between formulations.
• Integrating data into your quality control or product development .

Since 2020, YesWeLab has been supporting food, materials, cosmetics and nutraceutical manufacturers in mastering their thermal analyses through its digital analysis management platform (quote request, sample tracking, report receipt).

To complement your thermal testing, also check out:

• DMA (dynamic mechanical analysis) for the study of viscoelastic properties.
• The flammability test to evaluate the resistance of materials to combustion.

For any specific request, contact our scientific team to benefit from complete support for your heat capacity and thermal property analyses.