A Study on the Synthesis and Characteristics of a Blend of Natural Rubber and Hydrogenated Acrylonitrile-Butadiene Rubber
Hyun-Ho Park and Chang-Seop Lee
Department of Chemistry, Keimyung University, 1095 Dalgubeol-daero Dalseo-Gu, Daegu, 42601 Republic of Korea
Abstract: Natural rubber (NR) is a vulcanizing agent that is widely used in industrial applications; thus, its resistance to oil, ozone, and high temperatures should be improved. Similarly, hydrogenated acrylonitrile–butadiene rubber (HNBR) vulcanizers require a better elastic performance. Therefore, in this study, NR and HNBR with polarity differences were mixed via the master batch blend method to prepare a blend, and the vulcanization, basic physical properties, and resilience properties of each blend were evaluated. Changes in the mechanical properties, ozone resistance, and resilience modulus after heat treatment at ~70–120 °C were evaluated for each blend formulation. It was found that, as the NR content increased, the vulcanization rate increased, and as the HNBR content increased, the performance improved in terms of heat and ozone resistance. However, no resilience effect was found because of the crystallinity of HNBR. From the results of this study, it can be concluded that, if NR/HNBR is blended to the specifications required for heat and ozone resistance, it will be useful for applications requiring a superior performance than individual NR and HNBR.
Keywords: NR, HNBR, Blend, Heat resistance, Physical performance, Masterbatch.