Calorimeter semi-micro

Stull, D.R. A semi-micro calorimeter for measuring heat capacities at low temperatures, / Am. Chem. Soc., 59(12) 2726-2733, 1937. 

Isothermal calorimeters have also been used in polymer studies and primarily in investigations of heats and rates of polymerization reactions 28—37). Shielding and controls in reaction calorimeters are not as critical as in nonisothermal calorimeters used in spedfic heat measurement since most polymerization reactions are accompanied by relatively large enthalpy changes. On the other hand special attention must be jaid in the selection of the calorimeter material for a particular combination of monomers, solvents, catalysts, etc, to ensure inertness of the reactor wall to reaction components. Frisch and Mackle describe an aneroid high precision, semi-micro reaction calorimeter (Fig. 2) usable for a wide range of reaction systems including those in which one component is a gas. 

For the determination of reaction parameters, as well as for the assessment of thermal safety, several thermokinetic methods have been developed such as differential scanning calorimetry (DSC), differential thermal analysis (DTA), accelerating rate calorimetry (ARC) and reaction calorimetry. Here, the discussion will be restricted to reaction calorimeters which resemble the later production-scale reactors of the corresponding industrial processes (batch or semi-batch reactors). We shall not discuss thermal analysis devices such as DSC or other micro-calorimetric devices which differ significantly from the production-scale reactor. 

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