BS ISO 974-2000
塑料.用冲击法测定脆性温度

Plastics - Determination of the brittleness temperature by impact

BS ISO 974-2000 发布历史

This International Standard specifies a method for the determination of the temperature at which plastics that are not rigid at normal ambient temperature exhibit brittle failure under specified impact conditions. A supplementary technique using notched specimens develops brittleness values at a much higher temperature than are observed for unnotched specimens of the same plastic material. The method utilizes a statistical technique to quantify the brittleness failure temperature. Provisions are made for the testing of sufficient specimens to permit the calculation of the brittleness temperature on a statistical basis. Statistical techniques have been developed to quantify the brittleness temperature as is defined in 3.1. The method establishes the temperature at which there is a 50 % chance of failure in either unnotched or notched specimens. This method has been found useful for specification purposes, although it does not necessarily measure the lowest temperature at which the material may be used. In the measurement of the brittleness temperature, the precision of the measurement should preferably be ±5 ℃ at the worst when establishing values used in material specifications.

BS ISO 974-2000由英国标准学会 GB-BSI 发布于 2000-05-15，并于 2000-05-15 实施。

BS ISO 974-2000 在中国标准分类中归属于: G31 合成树脂、塑料基础标准与通用方法，在国际标准分类中归属于: 83.080.01 塑料综合。

BS ISO 974-2000的历代版本如下：

• 2000年05月15日 BS ISO 974-2000 塑料.用冲击法测定脆性温度

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标准号

BS ISO 974-2000

发布日期

2000年05月15日

实施日期

2000年05月15日

废止日期

无

中国标准分类号

G31

国际标准分类号

83.080.01

发布单位

GB-BSI

适用范围

This International Standard specifies a method for the determination of the temperature at which plastics that are not rigid at normal ambient temperature exhibit brittle failure under specified impact conditions. A supplementary technique using notched specimens develops brittleness values at a much higher temperature than are observed for unnotched specimens of the same plastic material. The method utilizes a statistical technique to quantify the brittleness failure temperature. Provisions are made for the testing of sufficient specimens to permit the calculation of the brittleness temperature on a statistical basis. Statistical techniques have been developed to quantify the brittleness temperature as is defined in 3.1. The method establishes the temperature at which there is a 50 % chance of failure in either unnotched or notched specimens. This method has been found useful for specification purposes, although it does not necessarily measure the lowest temperature at which the material may be used. In the measurement of the brittleness temperature, the precision of the measurement should preferably be ±5 ℃ at the worst when establishing values used in material specifications.