ASTM D3895-2007 用差示扫描量热法测定聚烯烃的氧化感应时间的标准试验方法
【英文标准名称】: Standard Test Method for Oxidative-Induction Time of Polyolefins by Differential Scanning Calorimetry 【原文标准名称】: 用差示扫描量热法测定聚烯烃的氧化感应时间的标准试验方法 【标准号】: ASTM D3895-2007 【标准状态】: 现行 【国别】: 【发布日期】: 2007 【实施或试行日期】: 【发布单位】: 美国材料与试验协会(US-ASTM)【起草单位】: D20.30【标准类型】: (Test Method)【标准水平】: ()【中文主题词】: 分析;感应;塑料;聚烯烃;测试【英文主题词】: differential scanning calorimetry; oxidative induction time; polyolefins【摘要】: The OIT is a qualitative assessment of the level (or degree) of stabilization of the material tested. This test can be used as a quality control measure to monitor the stabilization level in formulated resin as received from a supplier, prior to extrusion. Note 28212;The OIT measurement is an accelerated thermal-aging test and as such can be misleading. Caution should be exercised in data interpretation since oxidation reaction kinetics are a function of temperature and the inherent properties of the additives contained in the sample. For example, OIT results are often used to select optimum resin formulations. Volatile antioxidants may generate poor OIT results even though they may perform adequately at the intended use temperature of the finished product. Note 38212;There is no accepted sampling procedure, nor have any definitive relationships been established for comparing OIT values on field samples to those on unused products, hence the use of such values for determining life expectancy is uncertain and subjective. 1.1 This test method outlines a procedure for the determination of oxidative-induction time (OIT) of polymeric materials by differential scanning calorimetry (DSC). It is applicable to polyolefin resins that are in a fully stabilized/compounded form. 1.2 The values stated in SI units are to be regarded as the 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 and health practices and determine the applicability of regulatory limitations prior to use. Specific hazards information is given in Section 8. Note 1This test method is similar to ISO 11357-6, but not equivalent. ISO procedure provides additional information not supplied by this test method.【中国标准分类号】: G31【国际标准分类号】: 83_080_20【页数】: 8P.;A4【正文语种】:
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