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

Dynamic DSC를 이용한 개질 고무 블랜드의 가황 반응에 관한 연구

  • Lee, Seung-Hyun (Department of Chemical Engineering, Keimyung University) ;
  • Ahn, Won-Sool (Department of Chemical Engineering, Keimyung University)
  • 이승현 (계명대학교 공과대학 화학공학과) ;
  • 안원술 (계명대학교 공과대학 화학공학과)
  • Published : 2003.12.31

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.

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