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
This part of ISO 13885 describes the determination of the molar-mass distribution, number-average molarmass Mn and mass-average molar mass Mw of polymers that are soluble in THF (tetrahydrofuran) by gelpermeation chromatography (GPC)I).It is possible that, in spite of the good repeatability obtained with this method, it cannot be used with certainpolymer types because of specific interactions, such as adsorption within the sample/eluentJcolumn 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 ofpolymers 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 sampleswith .~/w values greater than 106 (see Annex C).No correction methods, e.g. for the elimination of peak broadening, are included in this part of ISO 13885. Ifabsolute molar-mass values are required, an absolute method, e.g. membrane osmometry for .Un or lightscattering for Mw, must be used.
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