The chloroprene Rubber (CR)/natural Rubber(NR) compounds were prepared by adding chlorinated butyl rubber or cardanol as compatibilizers of CR/NR blends. CR/NR blends were vulcanized at 160℃according to the optimum curing time. The results of rubber processibility analyzer (RPA) showed that cardanol made that the storage modulus and the optimum curing time of the CR/NR compounds were all reduced significantly
and the processability of CR/NR blends were improved. The photos of scanning electron microscopy (SEM) indicated that the compatibility of CR and NR could be improved by incorporating either chlorinated butyl rubber or cardanol into CR/NR blends. The curves of differential scanning calorimetry (DSC) showed that cardanol not only had better compatibilization effect than chlorinated butyl rubber
but also played the role of plasticizer. The mechanical properties show that with the increase of mass ratio of cardanol
the modulus of CR/NR blends decreased significantly and the elongation at break increased significantly.