Article
  • Physical Properties and Failure Behaviors of NR/BR Blend Compounds
  • Nah C, Jo BW
  • NR/BR 블렌드 컴파운드의 물리적 특성 및 파괴거동
  • 나창운, 조병욱
Abstract
Various physical properties including failure properties were investigated for carbon black-filled NR/BR(natural rubber/polybutadiene rubber) blends in terms of blend ratio. To see the effect of carbon black type, two different carbon blacks were also incorporated in the rubber blends. In the range of BR content below 40 phr (NR-rich range), the effect of BR content on the tensile strength and tack property of the green compounds was relatively. small, but a considerable effect was observed in the range above 40 phr. Apparent cure rate of NR was higher than that of BR. NR vulcanizate was found to be much stronger than BR one in view of tensile strength, crack resistance, and fatigue resistance, however, it was rather inferior in view of abrasion resistance, cutting-chipping resistance, and resistance to heat.

카본블랙이 충진된 NR/BR(natural rubbe/polybutadiene rubberr) 블렌드에 대해 조성비에 따른 여러 가지 물리적 특성 및 파괴특성을 조사하였다. 카본블랙 종류에 대한 영향도 함께 검토하기 위해 두가지 다른 카본블랙을 동량 적용하여 비교하였다. BR 함량이 약 40 phr 이하 즉, NR이 상대적으로 많은 조성비 영역에서는 BR 함량증가에 따라 미가황 고무컴파운드의 인장강도, 점착특성은 그다지 큰 변화를 보이지 않은반면 그 이상의 영역에서는 상대적으로 큰 영향을 보였다. 가황속도는 NR이 BR보다 빠른 것을 확인하였다. 가황 고무컴파운드의 인장강도, 규녕저항성, 피로저항성은 NR이 BR보다 월등히 우수한 반면, 마모저항성, 커팅-치핑 저항성, 내열성은 오히려 BR이 NT보다 우수한 결과를 확인하였다.

Keywords: natural rubber; polybutadiene rubber; blend; physical property; failure

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  • Polymer(Korea) 폴리머
  • Frequency : Bimonthly(odd)
    ISSN 0379-153X(Print)
    ISSN 2234-8077(Online)
    Abbr. Polym. Korea
  • 2023 Impact Factor : 0.4
  • Indexed in SCIE

This Article

  • 1999; 23(2): 271-280

    Published online Mar 25, 1999