Differential scanning calorimetry technique

Strict control of the fusion process is imperative. In addition to thickness, hardness, continuity and adhesion checks, correct cure may be assessed by differential scanning calorimetry techniques, which are designed to measure any difference in the glass transition temperature of a laboratory-cured powder and the cured coating taken from the factory-coated pipe. 

This paper reviews recycling technologies of PMMA waste, its applications and its markets. It relates in detail experimentation on thermal and oxidative depolymerisation of PMMA scrap, under nitrogen and oxygen atmospheres, at different heating rates by thermogravimetry and differential scanning calorimetry techniques. 15 refs. 

Ollivon, M., Loisel, C., Lopez, C., Lesieur, P., Artzner, F., Keller, G. 2001. Simultaneous examination of structural and thermal behaviours of fats by coupled X-ray diffraction and differential scanning calorimetry techniques application to cocoa butter polymorphism. In, Crystallization and Solidification Properties of Lipids (N. Widlak, R. Hartel, S. Narine, eds.), pp. 34-41, AOCS Press, Champaign, IL. 

Simultaneous Examination of Structural and Thermal Behaviors of Fats by Coupled X-ray Diffraction and Differential Scanning Calorimetry Techniques Application to Cocoa Butter Polymorphism... 

The energy yield of porous silicon explosive devices was measured using a calorimetric bomb test, resulting in a value of 7.3 kJ/g with calcium perchlorate as oxidizer (Clement et al. 2005). Differential scanning calorimetry techniques were also used to measure the energy output for sodium perchlorate at almost 9 kJ/g (Plummer et al. 2008). The extent of the NaC104 reaction was observed with bomb calorimetry in N2 and O2 atmospheres. Without the supplementary O2 environment, the heat of reaction was measured to be 9.9 1.8 kJ/g, but with supplementary O2, the reaction yielded 27.3 3.2 kJ/g and approached the theoretical value of 33.0 kJ/g for complete Si oxidation (Becker et al. 2010). 

Ghaemy M and Sadjady S (2006), Kinetic analysis of curing behavior of diglycidyl ether of bisphenol A with imidazoles using differential scanning calorimetry techniques , J Appl Polym Sci, 100, 2634—2641. doi 10.1002/app.22716. 

J.W. Beckmann, J.S. Wilkes, R.R. McGuire, "2,4,6—Trinitrotoluene Thermal Decomposition Kinetic Parameters Determined by the Isothermal Differential Scanning Calorimetry Technique", Thermochim. Acta. 19. 111—118 (1977). 

Soft crystal phases are more difficult to identify only by polarized light microscopy, because changes in the aspect of optical textures are very few. To determine the transitions between different phases of a soft crystal, the differential scanning calorimetry technique should be applied, while the structure, and the soft crystal type can be identified by X-ray diffraction. 

I.5.4. Multihyphenated Thermogravimetry-Differential Scanning Calorimetry Techniques... 

Thermoporometry is a technique that allows the pore structures of materials in the liquid state to be studied to determine the pore size distribution in porous media by means of the Gibbs-Thomson equation (Brun et al., 1977). The principle of the method is based on the decrease of the triple point temperature of a liquid filling a porous material. Importantly phase transitions, such as crystallization or melting, for a liquid confined within a pore can shift to lower temperatures which can be correlated to pore size. This difference in transition temperature between confined and bulk solvent can be analysed by differential thermal analysis or differential scanning calorimetry techniques. 

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