Driving force for shape memory effect of polymers

In this study, we aim to evaluate the shape memory effect of a Poly (Caprolactone) (PCL) (40%) and Styrene-Butadiene-Styrene (SBS) (60%) blend. Shape cycle tests are performed at different temperatures detect best recovery rate. Under appropriate temperature, blend recovers substantially its original shape. To study rate evolution, multi realized with controlled temperature. The results indicate that growths when number increases. stored energy acts as driving force bring polymer permanent after each loading cycle. Then, an method is proposed measure stress-strain evolution during recovery. With variable no standard test can follow evolution. This needed validate behavior model.