1.1 本试验方法包括使用挤出塑性计测定熔融热塑性树脂的挤出速率。 1.2 以国际单位制表示的数值应视为标准。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 注1: 本标准和ISO 1133涉及相同的主题，但技术内容不同。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 这种测试方法对于热塑性塑料的质量控制测试特别有用。 5.2 通过该测试方法产生的数据用于指示通过单个工艺制备的聚合物的流速的均匀性。在没有与其他测试数据的有效相关性的情况下，不得将其用作其他特性均匀性的指示。 5.3 用挤出塑性计获得的流速不是聚合物的基本性质。它是一个经验定义的参数，受聚合物的物理性质和分子结构以及测量条件的严重影响。聚合物熔体的流变特性取决于许多变量。该测试中出现的这些变量的值可能与大规模过程中的值有很大不同，这将导致数据与处理行为不直接相关。 5.4 使用中为材料列出的任何条件测量材料的流速 X4.1 .对于许多材料，有一些规范要求使用该测试方法，但在遵守规范时，有一些程序修改优先。因此，在使用本试验方法之前，建议参考该材料规范。分类中的表1 D4000 列出了当前存在的ASTM材料标准。聚氯乙烯（PVC）化合物的另一种试验方法见《试验方法》 D3364 。 5.5 如果使用一种以上的条件，则可以获得材料的附加特性。在采用两个或多个条件的情况下，通过将一个条件下的流速除以另一个条件的流速来获得流速比（FRR）。 步骤D提供了一种在一次充电中测量一种以上状况的方法。 5.6 通常情况下，除了最仔细的检查外，测试技术、仪器几何形状或测试条件都会发生变化，从而导致流速测定的差异。故障排除指南位于 附录X2 并且它是用于识别测试误差源的资源。

1.1 This test method covers the determination of the rate of extrusion of molten thermoplastic resins using an extrusion plastometer. 1.2 The values stated in SI units are to be regarded as standard. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. Note 1: This standard and ISO 1133 address the same subject matter, but differ in technical content. 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 This test method is particularly useful for quality control tests on thermoplastics. 5.2 The data produced by this test method serves to indicate the uniformity of the flow rate of the polymer as made by an individual process. It is not to be used as an indication of uniformity of other properties without valid correlation with data from other tests. 5.3 The flow rate obtained with the extrusion plastometer is not a fundamental polymer property. It is an empirically defined parameter critically influenced by the physical properties and molecular structure of the polymer and the conditions of measurement. The rheological characteristics of polymer melts depend on a number of variables. It is possible that the values of these variables occurring in this test will differ substantially from those in large-scale processes, which would result in data that does not correlate directly with processing behavior. 5.4 Measure the flow rate of a material using any of the conditions listed for the material in X4.1 . For many materials, there are specifications that require the use of this test method, but with some procedural modifications that take precedence when adhering to the specification. Therefore, it is advisable to refer to that material specification before using this test method. Table 1 in Classification D4000 lists the ASTM materials standards that currently exist. An alternative test method for poly (vinyl chloride) (PVC) compounds is found in Test Method D3364 . 5.5 Additional characterization of a material can be obtained if more than one condition is used. In the case that two or more conditions are employed, a Flow Rate Ratio (FRR) is obtained by dividing the flow rate at one condition by the flow rate at another condition. Procedure D provides one method to measure more than one condition in a single charge. 5.6 Frequently, variations in test technique, apparatus geometry, or test conditions, which defy all but the most careful scrutiny, exist, causing discrepancies in flow rate determinations. A troubleshooting guide is found in Appendix X2 and it is a resource to be used to identify sources of test error.