1.1 本试验方法包括使用螺杆挤出式毛细管流变仪测量热塑性塑料和热塑性化合物的流动特性。通过实验室调查获得的测量流动特性可能有助于描述工厂加工过程中发生的材料行为。 1.2 由于螺旋式毛细管流变仪在试验过程中向材料传递剪切能，因此测量结果通常与活塞式毛细管流变仪的测量结果不同（见试验方法 D3835 ). 1.3 试验方法中描述了热塑性塑料和热塑性化合物的毛细管流变仪测量 D3835 . 1.4 以国际单位制表示的数值应视为标准值。 1.5 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户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: 没有已知的ISO等效于本标准。ISO中提到了本标准的范围 11443:2014，《塑料-使用毛细管和缝模流变仪测定塑料的流动性》，附录C，“通过毛细管挤出测定剪切粘度的不确定性” 1.6 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 本试验方法可用于表征热塑性塑料和热塑性化合物的粘度或流动阻力。 5.2 该测试方法产生的数据在两个质量方面都很有用- 控制测试和化合物开发。然而，并不意味着与工厂条件直接相关。 5.3 流动性能数据允许对进入的热塑性塑料和热塑性化合物进行质量控制，因为流动参数对分子量和分子量分布很敏感。因此，该测试方法可以区分批次之间的差异。 5.4 热塑性塑料和热塑性化合物的剪切粘度或流动粘度不仅对原聚合物分子特性敏感，还将受到填料、添加剂、增塑剂或稳定剂的类型和数量、共聚物混合物的类型以及其他复合材料的添加的影响。该测试方法可作为来料或生产混合的内部质量保证检查的质量控制工具。该测试方法有助于研究和开发新产品，因为可以测量尚未表征的热塑性塑料或热塑性化合物的流变行为，并考虑进行比较分析。

1.1 This test method covers the use of a screw-extrusion-type capillary rheometer for the measurement of flow properties of thermoplastics and thermoplastic compounds. The measured flow properties, which are obtained through laboratory investigation, may help to describe the material behavior that occurs in factory processing. 1.2 Since a screw-type capillary rheometer imparts shear energy to the material during testing, the measurements will usually differ from those obtained with a piston-type capillary rheometer (see Test Method D3835 ). 1.3 Capillary rheometer measurements for thermoplastics and thermoplastic compounds are described in Test Method D3835 . 1.4 The values stated in SI units are to be regarded as standard. 1.5 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: There is no known ISO equivalent to this standard. The scope of this standard is mentioned in ISO 11443:2014, Plastics—Determination of the fluidity of plastics using capillary and slit-die rheometers,” Annex C, “Uncertainties in the determination of shear viscosity by capillary extrusion.” 1.6 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 useful for the characterization of thermoplastics and thermoplastic compounds, in terms of viscosity, or resistance to flow. 5.2 The data produced by this test method has been found useful in both quality-control testing and compound development. However, direct correlation with factory conditions is not implied. 5.3 Flow-performance data permits quality control of incoming thermoplastics and thermoplastic compounds because the flow parameters are sensitive to molecular weight and molecular-weight distribution. Therefore, this test method may distinguish differences between lots. 5.4 The shear viscosity or flow viscosity of thermoplastics and thermoplastic compounds will not only be sensitive to the raw-polymer molecular properties, but will also be affected by the type and amount of filler, additive, plasticizer, or stabilizer, by the type of copolymer blend, and by the addition of other compounding materials. This test method can serve as a quality-control tool for either incoming materials or for in-house quality-assurance checks on production mixing. This test method is useful to the research and development of new products in that the rheological behavior of a yet uncharacterized thermoplastic or thermoplastic compound can be measured and considered for comparative analysis.