Standard Test Method for Brittleness Temperature of Plastics and Elastomers by Impact

Abstract

5.1 This test method establishes the temperature at which 50 % of the specimens tested would probably fail when subjected to the conditions specified herein. The test provides for the evaluation of long-time effects such as crystallization, or those effects that are introduced by low-temperature incompatibility of plasticizers in the material under test. Plastics and elastomers are used in many applications requiring low-temperature flexing with or without impact. Use data obtained by this method to predict the behavior of plastic and elastomeric materials at low temperatures only in applications in which the conditions of deformation are similar to those specified in this test method. This test method has been found useful for specification purposes, but does not necessarily measure the lowest temperature at which the material is suitable for use. FIG. 1 Dimensional Requirements Between Specimen Clamp and Striking Edge (Type A) FIG. 2 Typical Clamp (Type A) FIG. 3 Dimensional Details of Striking Edge and Clamping Device, Type B (Positioning of Unnotched Test Specimen) Note 1: Dimensions are in millimetres. FIG. 4 Assembled Clamp with Test Specimens, Type B