ISO 20965-2005 塑料.聚合物熔体瞬态拉伸粘度的测定
【英文标准名称】: Plastics - Determination of the transient extensional viscosity of polymer melts 【原文标准名称】: 塑料.聚合物熔体瞬态拉伸粘度的测定 【标准号】: ISO 20965-2005 【标准状态】: 现行 【国别】: 国际 【发布日期】: 2005-02 【实施或试行日期】: 【发布单位】: 国际标准化组织(ISO)【起草单位】: ISO/TC 61【标准类型】: ()【标准水平】: ()【中文主题词】: 聚合物熔体;定义;试验;粘度;高聚物;塑料;粘度测量;测量技术;粘度值【英文主题词】: Definition;Definitions;Measuring techniques;Plastics;Polymer melt;Polymers;Testing;Viscosity;Viscosity measurement;Viscosity numbers【摘要】: This International Standard specifies the general principles of a method for determining the transient extensional viscosity of polymer melts. The procedure details the measurement of polymer melt specimens stretched uniaxially under conditions of constant strain rate and constant temperature.The method is capable of measuring the transient extensional viscosity of polymer melts at Hencky strain rates typically in the range 0,01 s to 1 s, at Hencky strains up to approximately 4 and at temperatures up to approximately 250 ℃ (see Notes 1 and 2). It is suitable for measuring transient extensional viscosity values typically in the range from approximately 10 Pas to 10 Pa·s (see Note 3).NOTE 1 Hencky strains and strain rates are used (see Clause 3).NOTE 2 Values of strain, strain rate and temperature outside these limiting values may be attained.NOTE 3 The operating limit of an instrument, in terms of the lowest transient extensional viscosity values that can be measured, is due to a combination of factors, including the ability of the specimen to maintain its shape during testing and the resolution of the instrument.A list of documents related to this International Standard is given in the Bibliography.【中国标准分类号】: G31【国际标准分类号】: 83_080_01【页数】: 18P;A4【正文语种】: 英语
页:
[1]