Effect of trans-octylene rubber(TOR) on the properties of NBR/EPDM rubber blends

Trans-octylene rubber(TOR)의 첨가가 NBR/EPDM 고무블렌드의 물성에 미치는 영향

  • 신영식 (한양대학교 공학대학 화학공학과) ;
  • 장영욱 (한양대학교 공학대학 화학공학과)
  • Published : 2000.06.30

Abstract

trans-octylene rubber(TOR) was melt-blended with an incompatible NBR/EPDM (70/30) blend. Mixing torque and temperature were reduced as TOR was added to the NBR/EPDM blend. Rheometer results indicated that TOR participated in vulcanization and became a part of network. A scanning electron micrograph demonstrated that EPDM was dispersed in NBR matrix in the blend and the addition of TOR led to a finer dispersion of EPDM particles. On the addition of TOR, the tensile strength, the tensile strain as well as the modulus of the blend vulcanizates increased. The ozone resistance of the blends determined in terms of critical stress-strain parameter was significantly enhanced in the blend as TOR was added. Improvements in the properties were believed to be associated with fine morphology and the increase in crosslink density due to the chain entanglement of the ternary blends.