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A Study on Vulcanization Reaction of Modified Rubber Blends Using Dynamic Differential Scanning Calorimetry  

Lee, Seung-Hyun (Department of Chemical Engineering, Keimyung University)
Ahn, Won-Sool (Department of Chemical Engineering, Keimyung University)
Publication Information
Elastomers and Composites / v.38, no.4, 2003 , pp. 326-333 More about this Journal
Abstract
Even though many studies have been reported about rubber vulcanization, it is still remained difficult to find a quantitative relationship between the final states of vulcanized rubber and initial formulation or processing conditions. Dynamic differential scanning calorimetry (DSC) method is known as a comparatively easy method to research for the rubber vulcanization in both experimental and analysis. In the present research, a study on the vulcanization reaction of NR/CB composites modified by isoprene(IR) and chloroprene(CR) rubbers is carried out using dynamic DSC method. Thermograms with several different heating rates were obtained and analyzed using the Kissinger method. Analysis showed that the vulcanization reaction was progressed through the first order reaction mechanism. In addition, the reaction temperature was severely influenced by the kinds or rubber modifiers, in this case, more influenced by CR than by IR. Those effects were clearly verified in the values of activation energy. Kinds of carbon blacks, however, could hardly influence on the reaction mechanism.
Keywords
isoprene rubber; chloroprene rubber; carbon black; vulcanization; dynamic differential scanning calorimetry;
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