NR/NBR 블렌드 컴파운드의 물리적 특성 = Phyco-Mechanical Properties of NR/NBR Blend Compounds

다국어 초록 (Multilingual Abstract)

Various mechanical properties of natural rubber/butadiene-acrylonitrile rubber (NR/NBR) blend compounds were investigated. A typical NBR having 34% of acrylonitrile was selected in the study. The NBR content in the blend was varied from 0 to 100 phr. Mooney viscosity increased linearly but stress relaxation time and green tack decreased with increasing NBR content. Tensile modulus, heat build-up and rate of crack propagation increased while strain at break, rebound and rate of wear decreased as the NBR content was increased. Tensile stress at break stayed constant up to about 60 phr of NBR and thereafter increased with increasing NBR content. Based on tan a peak, the glass transition temperature of NR and NBR were found to be -55°C and -10°C respectively. In the case of NR/NBR blend compounds, two distinct transition points were observed and each transition temperature was found to be independent of NBR level indicating an incompatible characteristics of NR/NBR blend system.