Effect of NR/BR Blends ratio and Oil Content on the Mechanical Properties of Rubber Isolator at Low Temperature

저온환경에서 NR/BR 블렌드 조성비 및 오일함량이 방진고무재료의 기계적 특성에 미치는 영향

  • Kim, Wan-Doo (Micro System & Structural Mechanics Group, Korea Institute of Machinery and Materials) ;
  • Kim, Wan-Soo (Micro System & Structural Mechanics Group, Korea Institute of Machinery and Materials) ;
  • Woo, Chang-Soo (Micro System & Structural Mechanics Group, Korea Institute of Machinery and Materials) ;
  • Choi, Sung-Seen (Dept. of Applied Chemistry, Sejong University)
  • 김완두 (한국기계연구원 마이크로응용역학그룹) ;
  • 김완수 (한국기계연구원 마이크로응용역학그룹) ;
  • 우창수 (한국기계연구원 마이크로응용역학그룹) ;
  • 최성신 (세종대학교 응용화학과)
  • Published : 2004.06.30

Abstract

New compounds were made using various NR/BR blend ratio and oil content to improve mechanical properties of rubber isolator at low temperature. Mechanical properties were investigated as a function of NR/BR blend ratio and oil content. Hardness and tensile modulus generally increased, but tensile strength and elongation at break decreased with increasing BR content. Hardness, tensile modulus and tensile strength decreased, but elongation at break were nearly the same with increasing oil content. The glass transition temperature of NR and BR were found to be $-50^{\circ}C$ and $-90^{\circ}C$ respectively based on the abrupt drops in storage elastic modulus and peak of loss factor. Two distinct transition temperature were observed in NR/BR blend compounds and each transition point was not affected by blend level indicating incompatible nature of NR/BR blend.

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