标准编号：ISO 815-2:2019
中文名称：硫化橡胶或热塑性橡胶 压缩形变的测定 第2部分：低温下测量
英文名称：Rubber, vulcanized or thermoplastic — Determination of compression set — Part 2: At low temperatures
发布日期：2019-11
标准范围
This document specifies two methods for the determination of the compression set characteristics of
vulcanized and thermoplastic rubbers at low temperatures.
Method 1 derives from the methodology used in ISO 815-1. Method 2 uses a specified testing device,
allowing to measure and record the test piece thickness during recovery. Due to the load applied during
recovery in method 2, no correlation can be established between the results given by both methods.
NOTE When rubber is held under compression, physical or chemical changes that prevent the rubber
returning to its original dimensions after release of the deforming force can occur. The result is a set, where the
magnitude of which depends on the time and temperature of compression as well as on the time, temperature,
and conditions of recovery. At low temperatures, changes resulting from the effects of glass hardening or
crystallization become predominant and, since these effects are reversed by raising the temperature, therefore,
the measurements are always taken at the test temperature.
立即下载标准文件