1.1 本试验方法包括在-40至400°C的温度范围内测定塑料的导热性。可以在0.08至2.0 W/m.K的范围内测量填充和未填充热塑性塑料、热固性塑料和橡胶的导热性。 1.2 以国际单位制表示的数值应视为标准值。 1.3 本标准无意解决与其使用相关的安全问题（如有）。本标准的用户有责任在使用前建立适当的安全和健康实践，并确定监管限制的适用性。 注1: 没有已知的ISO等效于该试验方法。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 5.1 试验方法相对简单，适用于多种材料 ( 4. , 5. ) . 该技术能够快速测量，使得在材料发生热降解之前获取数据成为可能。或者，可以研究化学反应或老化等成分变化的影响 ( 6. ) . 测量时间短，可以轻松生成大量数据。线源探头和随附的试样尺寸较小，使样品能够经受各种测试条件。由于本试验方法不包含数值精度和偏差声明，因此在有争议的情况下，不得将其用作仲裁试验方法。

1.1 This test method covers the determination of the thermal conductivity of plastics over a temperature range from –40 to 400°C. It is possible to measure the thermal conductivity of filled and unfilled thermoplastics, thermosets, and rubbers in the range from 0.08 to 2.0 W/m.K. 1.2 The values stated in SI units shall be regarded as standard. 1.3 This standard does not purport to address the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish proper safety and health practices and determine the applicability of regulatory limitations prior to use. Note 1: There is no known ISO equivalent to this test method. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 The relative simplicity of the test method makes it applicable for a wide range of materials ( 4 , 5 ) . The technique is capable of fast measurements, making it possible to take data before the materials suffer thermal degradation. Alternatively, it is possible to study the effect of compositional changes such as chemical reaction or aging ( 6 ) . Short measurement times permit generation of large amounts of data with little effort. The line-source probe and the accompanying test specimen are small in size, making it possible to subject the sample to a wide range of test conditions. Because this test method does not contain a numerical precision and bias statement, it shall not be used as a referee test method in case of dispute.