Elastomers and Composites

The Rubber Society of Korea (한국고무학회)
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Study of the Scorch/Cure time Relationships

스코치/가황시간의 상관관계에 관한 연구

  • Ryou, Jin-Ho (Applied Polymer Research Team, Research Institute of Industrial Science & Technology(RIST)) ;
  • Kim, Chang-Hee (Kwangsung Rubber Roll Co. LTD.) ;
  • Oh, Taeg-Su (Applied Polymer Research Team, Research Institute of Industrial Science & Technology(RIST))
  • 류진호 (산업과학기술연구소 고분자응용연구팀) ;
  • 김창희 (광성고무롤(주)) ;
  • 오택수 (산업과학기술연구소 고분자응용연구팀)
  • Published : 1996.03.30
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Abstract

NR, NBR, and CR rubber were prepared by mixing filler in various ratios. Their vulcanization characteristics and thermal properties were studied. Vulcanization characteristics were investigated using cure curve that had been obtained from oscillating disk rheometer study. The Arrhenius law is known to describe the relationship between cure time and temperature of most elastomers. Curing could be done by the addition of sulfur, peroxides, and proper acceleratores. The optimum cure time that affects desirable values of modulus and tensile strength of the vulcanizate is taken as t90 as measured by a rheometer. Rubbers were cured in the rheometer at temperatures ranging from $130^{\circ}C\;to\;180^{\circ}C$ in order to check the validity of the curing system used. A linear relationship between ln(ts2) and ln(t90) was found for all elastomers. The term sensitivity has been used to describe the relationship between a change of ts2 to the corresponding change of t90 due to an increment of temperature. This is related to the formula of the compound.

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