Prediction of tensile strength of combine aged natural rubber/chloroprene rubber (NR/CR) blends using experimental statistical model

Abstract For prediction of tensile strength of combine aged NR/CR blends, samples with NR/CR ratios of 100/0, 95/5 and 90/10 were subjected heat aging at various temperatures, namely 100, 110 and 120°C, each for 22 h, followed by dynamic tensile loadings to 140 % and frequency 300 cycles/min. Then the tensile strengths of aged samples were defined. Based on obtained experimentally values the experimental statistical model was built using FORTRAN language. The model result in prediction equation for tensile strength of NR and NR/CR blends with low CR (not higher 10 %) contents. This equation seems to have fine usability, having relative error between calculated and experimentally defined values of tensile strength less than 10 % in the considered range of experiments.