标准号：ISO 16014-2-2003
实施状态：作废
中文名称：塑料.用粒度排除色谱法测定平均分子质量和分子质量分布.第2部分:通用校准法
英文名称：Plastics - Determination of average molecular mass and molecular mass distribution of polymers using size-exclusion chromatography - Part 2: Universal calibration method
发布日期：2003-04
被替代标准：ISO 16014-2-2012
代替标准：ISO/FDIS 16014-2-2003
采用标准：BS ISO 16014-2-2003,IDT;JIS K 7252-2-2008,MOD
起草单位：ISO/TC 61
标准简介：This part of ISO 16014 specifies a method for determining the average molecular mass and the molecular mass distribution of polymers using size-exclusion chromatography (SEC). The average molecular mass and the molecular mass distribution are calculated using a universal calibration curve instead of the conventional calibration curve. The concept of the universal calibration method is based on a relationship by which the retention time in SEC depends on the size of the polymer molecule (the hydrodynamic volume) or on the product of the intrinsic viscosity [η] and the molecular mass M. Many polymers classified as random-coil polymers (regardless of their chemical structure, degree of branching, composition or tacticity) have been experimentally confirmed as following this relationship. The universal calibration curve is constructed by plotting the logarithm of [η]M versus the elution time t or elution volume V using polymer standards such as polystyrene with narrow molecular mass distributions. The molecular mass Mi of an unknown polymer sample can then be calculated from the value of [η]M at each retention time using the universal calibration curve and [η] or K and a in the Mark-Houwink-Sakurada equation ([η] = KM<upa> →[η]M= KM<upa+1>, where K is a constant and a is an exponent depending on the experimental conditions. Therefore this test method is classified as a relative method as described in ISO 16014-1, but the average molecular masses and molecular mass distributions calculated by the method are equal to, or nearly equal to, the absolute values.
A list of documents related to this part of ISO 16014 is given in the Bibliography.
文件格式：PDF
文件大小：205.42KB
文件页数：18
（以上信息更新时间为：2019-11-23）
ISO 16014-2-2003 塑料.用粒度排除色谱法测定平均分子质量和分子质量分布.第2部分_通用校准法.pdf
(205.42 KB)
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