Differential Scanning Calorimetry
Differential Scanning Calorimetry (DSC)
Description
The differential scanning calorimetry (DSC) is a thermal analysis technique that records the flow of heat energy associated with transitions in materials as a function of temperature. This is a method of enthalpy variation, in which the difference in the supply of heat energy between a substance and a reference material is measured as a function of temperature, while both are subjected to the same program of heating or cooling, carefully controlled.
These measurements provide qualitative and quantitative processes in endothermic (absorbing heat) and exothermic (release heat) conditions, allowing to obtain information about changes in physical properties and / or chemical properties such as:
• Temperatures characteristics (melting, crystallization, glass transition).
• Degree of crystallinity of polymers.
• Phase diagram.
• Enthalpies of phase transition and reaction.
• Thermal and oxidative stability.
• Purity.
• Kinetics of reactions.
This technique can be used to characterize a wide range of materials other than polymers, including other common classes of organic and inorganic materials, crystalline or amorphous ceramics, glass, metals and alloys, fibers and plastics, composites, etc.. Application areas extend from the scientific to the industrial field, with particular importance in industries Pharmaceuticals and Cosmetics, Food, Polymer in the phase of research and development of a process or product in the phase of quality control raw materials and products.
Equipment
Differential scanning calorimeter - Setaram, France, model DSC 131.
This equipment works in the temperature range between -150 °C and +550 °C, the heating and cooling speeds between 0.001 and 50 °C / min. The sign of heat flux ranges from -100 to +100 mW and the resolution is ± 0.2 microW.
Sample
Homogeneous solid or liquid samples with a minimum of 10 mg.
Price analysis
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Universities and nonprofit organizations |
Profit organizations |
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1) Figures do not include VAT.
Discount table
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Number of samples |
Discount |
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0 - 4 |
0% |
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5 - 10 |
5% |
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11 - 20 |
10% |
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> 20 |
15% |
Analysis Request
The analysis request should be filled and signed by the head of the institution that makes the request (Download the application form). Analyses are performed by order of submission of application in laboratory analysis. The results are given within 24 hours. In the case of samples for method development and in the case of large numbers of samples, the response time is agreed with the authority solicitor.
The equipment is operated solely by the technician in charge. If requested by the client it is allowed direct contact with the equipment which provides a brief technical/theoretical accompanied demonstration working practice.
Upon request of an analysis the client should contact the technician directly responsible for the equipment to clarify all issues that involve the analysis.
Download the application form
The application form should be sent to Dr. Carla Rodrigues:
Laboratório de Análises
REQUIMTE - Rede de Química e Tecnologia
Departamento Química / Faculdade de Ciências e Tecnologia
Universidade Nova de Lisboa
2829-516 Caparica
Portugal
Tel: 351 212947805 (ext: 10993)
Fax:351 212948550
Delivery and receipt of samples
1 - Samples must be clearly identified, so that during manipulation does not erase the identification, and should be delivered well packaged.
2 - Delivery of results will be made by e-mail in PDF format, to be sent simultaneously to the applicant and responsible. In the case of complaints, they should be made within 15 working days.
3 - The remainder of the samples will be stored in the laboratory for 15 days after completion of the analysis, after which will be eliminated.