Charpy vs Izod
Laboratory > Mechanicals
| Charpy vs. Izod: una comparación de prueba de impacto | |
While the Izod and Charpy methods measure similar properties, the design and testing of the sample are different enough to be careful when choosing the method to be performed. Your test provider should be able to provide recommendations of methods based on their objectives and specific material in question. If you decide to make an Izod impact, you will have to decide which specimen configuration to use. There are different configurations of round specimens versus square samples and samples with single notches versus those with up to three notches. Since an average of 3 results is often required for impact tests, the 3-notch sample could be more economical. Another possible advantage of model 3 is that of the final result. This could help eliminate the bias caused by directional properties if this is a concern for your material. |  |
| Impact resistance | |
| The impact resistance (hardness) of a polymer depends on intrinsic and extrinsic factors. The important intrinsic factors are molecular structure, molecular weight (distribution), cohesive energy and morphology (crystallinity and crystal structure) to name just a few factors. The important extrinsic factors are the temperature, the impact speed, the shape and weight of the hammer, the geometry of the sample and the size and shape of the notch. |  |