标准编号：ISO 812:2017
中文名称：硫化橡胶或热塑性橡胶 低温脆性的测定
英文名称：Rubber, vulcanized or thermoplastic — Determination of low-temperature brittleness
发布日期：2017-07
标准范围
This document specifies a method for determining the lowest temperature at which rubber materials do not exhibit brittle failure or the temperature at which half of the test pieces used in a test fail when impacted under specified conditions. The temperatures thus determined do not necessarily relate to the lowest temperature at which the material can be used since the brittleness will be affected by the conditions of test and especially by the rate of impact. Data obtained by this method should, therefore, be used to predict the behaviour of rubbers at low temperatures only in applications in which the conditions of deformation are similar to those specified in the test.
Three procedures are described:
--procedure A, in which the brittleness temperature is determined;
--procedure B, in which the brittleness temperature for 50 % failure is determined;
--procedure C, in which the test piece is impacted at a specified temperature.
Procedure C is used in the classification of rubber materials and for specification purposes.
NOTE A similar test for rubber-coated fabrics is described in ISO 4646.
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