The notched Charpy and Izod tests are the most prevalent techniques used to characterize the effects of high impulse loads on polymeric materials. An analysis method for rubber toughened PVC is suggested to evaluate critical strain energy release rates from the Charpy impact energy measurements. The instrumented Charpy impact tests were conducted to extract ancillary information concerning fracture parameters of the polymeric materials in addition to total fracture energies and maximum critical loads. The stress intensity factor Kid was computed for varying amounts of rubber contents present in the PVC from the measured maximum critical loads and also the toughening effects of the rubber were investigated as well.
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