Contribution to the Thermochemistry of Rubber

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Abstract
1. An apparatus is described suitable for the calorimetry of slow reactions. 2. By determining the heat of adhesion between fillers and rubber when mixed together, a method is found for the relative evaluation of technical rubber fillers. The utility of the method is shown by the comparison of the thermal data obtained using several types of black with physical data already published. 3. The elongation and contraction of raw rubber were studied from a thermodynamic standpoint, and also the change in total energy, the work of elongation, and its temperature coefficients. 4. The heat tone of the reaction between sulfur chloride and rubber dissolved in benzine was determined at a concentration of 0 to 1.3 g. of sulfur chloride to one gram of rubber. Heat tones depending on chemical and colloid-chemical processes may be exhaustively studied in this way.

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