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Differential Scanning Calorimetry (DSC)

What is Differential Scanning Calorimetry (DSC)?

Differential Scanning Calorimetry (DSC) is a thermal analysis technique that measures heat flow into or out of a material as it is heated, cooled, or held under isothermal conditions. By tracking thermal transitions, DSC provides direct insight into phase changes and energy-related behavior that govern material performance.

At Materials Metric, DSC is used to determine glass transition temperature (Tg), melting and crystallization behavior, degree of crystallinity, thermal stability, and curing or crosslinking reactions. These measurements are essential for understanding how materials respond during processing, storage, and end-use, supporting polymers, pharmaceuticals, biomaterials, composites, and advanced material systems.

Use of DSC

DSC helps researchers:
• Determine Tg, melting point (Tm), crystallization temperature (Tc)
• Quantify polymer crystallinity
• Analyze curing kinetics and crosslinking behavior
• Assess thermal stability and formulation changes
• Compare thermal profiles before/after aging, sterilization, or processing
• Verify polymer blends, additives, and composite structures

Differential scanning calorimetry instrument used for thermal analysis
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Applications of DSC

  • Polymers & Plastics: crystallinity, Tg, blend compatibility
  • Biomaterials: hydrogel transitions, degradation profiles
  • Pharmaceuticals: polymorphs, purity, API melting
  • Composites: resin behavior and crosslink density
  • Coatings & Adhesives: curing profiles and thermal reactivity

Sample Analysis Process

1. Submission & Objective Review

  • Provide sample type, expected transitions, and testing goals
  • Define heating/cooling rates and temperature range

2. Sample Preparation (Correct Procedure)

  • Samples are tested as solids—no dissolution required
  • Powders, pellets, films, fibers, and small sections are placed into aluminum pans
  • Hermetic pans used for volatile, hydrated, or oxygen-sensitive materials
  • No solvents or liquid preparation is used
  • Sample masses are accurately recorded for enthalpy calculations

3. DSC Testing

  • Controlled heating/cooling cycles
  • Heat flow recorded vs. temperature
  • Optional modulated DSC (mDSC) for resolving overlapping events

4. Data Processing & Reporting

• Tg, Tm, Tc, crystallinity %, ΔH
• Annotated thermograms
• Interpretation aligned with material behavior, formulation, and processing history

Differential Scanning Calorimetry DSC instrument used to measure thermal transitions, heat flow, melting behavior, and phase changes in polymers and materials

Why Choose Materials Metric for Your DSC Analysis

Materials Metric delivers high-accuracy thermal transition analysis with scientific precision. Our DSC services offer:

  • Highly repeatable Tg, Tm, Tc, and crystallinity measurements
  • mDSC capabilities for complex thermal profiles
  • Deep expertise across polymers, biomaterials, adhesives, and pharmaceuticals
  • Comparative thermal analysis before/after processing, aging, sterilization, or formulation changes
  • Regulatory-ready reporting supporting ISO 10993, FDA submissions, and materials qualification

You receive actionable thermal insights, not just raw curves.

Related services 

To learn more about our Differential Scanning Calorimetry or other testing needs, please contact us.


Frequently Asked Questions

What is differential scanning calorimetry (DSC)?

DSC is a thermal analysis technique that measures the heat flow into or out of a sample as it is heated, cooled, or held isothermally, relative to an inert reference. It detects thermal transitions by recording how much energy a material absorbs or releases as its temperature changes.

What properties does DSC measure?

DSC characterizes glass transition temperature, melting and crystallization temperatures and enthalpies, percent crystallinity, curing and reaction heats, and oxidation onset. It is widely used to study polymers, pharmaceuticals, and other materials where phase behavior and thermal stability matter.

What sample is required for DSC?

A few milligrams (typically 2-20 mg) of material is sufficient, supplied as powder, pellet, film, or a small cut solid that fits a standard pan. A homogeneous, representative sample gives the most reliable transitions, and Materials Metric can advise on pan type and sample prep for your material.

Which standards apply to DSC?

DSC is commonly performed in line with ISO 11357 and ASTM E1356, with ASTM D3418 often used for transition temperatures and enthalpies of polymers. Materials Metric applies validated or fit-for-purpose methods aligned with ASTM/ISO where applicable to suit your material and objective.
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