ISO 13885-1:2008 色漆和清漆用粘合剂 凝胶渗透色谱法（GPC） 第1部分：用四氢呋喃作洗脱液
标准编号：ISO 13885-1:2008
中文名称：色漆和清漆用粘合剂 凝胶渗透色谱法（GPC） 第1部分：用四氢呋喃作洗脱液
英文名称：Binders for paints and varnishes — Gel permeation chromatography (GPC) — Part 1: Tetrahydrofuran (THF) as eluent
发布日期：2008-08
标准范围
ISO 13885-1:20 08描述了通过凝胶渗透色谱法(GPC)[也称为尺寸排阻色谱法(SEC)]测定可溶于THF(四氢呋喃)的聚合物的摩尔质量分布、数均摩尔质量Mn和质均摩尔质量Mw。尽管用该方法获得了良好的重复性，但由于特定的相互作用，例如在样品/洗脱液/柱系统内的吸附，它可能不能用于某些聚合物类型。该方法不是绝对方法，需要用已通过绝对方法表征的市售无支化聚苯乙烯标准品进行校准。因此，除聚苯乙烯以外的聚合物样品的结果仅在相同类型的样品组内具有可比性。ISO 13885本部分规定的条件不适用于Mw值大于106的聚合物样品的GPC分析。ISO 13885的这一部分不包括校正方法，例如用于消除峰展宽的校正方法。如果需要绝对摩尔质量值，则必须使用绝对方法，例如Mn的膜渗透压法或Mw的光散射法。
ISO 13885-1:2008 describes the determination of the molar-mass distribution, number-average molar mass Mn and mass-average molar mass Mw of polymers that are soluble in THF (tetrahydrofuran) by gel permeation chromatography (GPC) [also known as size exclusion chromatography (SEC)].It is possible that, in spite of the good repeatability obtained with this method, it cannot be used with certain polymer types because of specific interactions, such as adsorption within the sample/eluent/column system.The method is not an absolute one and requires calibration with commercially available unbranched-polystyrene standards that have been characterized by absolute methods. The results for samples of polymers other than polystyrene are therefore only comparable within groups of samples of the same type.The conditions specified in this part of ISO 13885 are not suitable for the GPC analysis of polymer samples with Mw values greater than 106.No correction methods, e.g. for the elimination of peak broadening, are included in this part of ISO 13885. If absolute molar-mass values are required, an absolute method, e.g. membrane osmometry for Mn or light scattering for Mw, must be used.
标准预览图
