Comparison of the results of creep and micro - Indentation creep to irradiated HDPE

Abstract

The main goal of this paper is to compare measurements of creep behavior of Crosslinking polymer materials. Creep properties have been measured by two methods, first is micro-indentation with Depth Sensing Indention (DSI) and the second method is long-term creep test in room temperature. These rather different methods enable better analyis of the influence of radiation crosslinking, and therefore better define the appropriate dose of radiation with respect to the use of polymer materials in practice. The evaluation criteria for DSI test is index CIT [%]. The evaluation criteria for the standard creep test is the value of average elongation at the end of the test. When comparing these two values is then possible to see a slight effect on the radiation dose for the standard creep test, which showed mikrocreepu only slightly.[1,2] © (2015) Trans Tech Publications, Switzerland.