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一、前言在前报中叙述了用简易GPC测定涤纶分子量分布的工作,本文是上述工作的继续。用GPC法测定腈纶(PAN共聚物)分子量分布所见报导不多。由于腈纶大分子中含有可电离基团(例如当以丙烯磺酸钠为第三单体时,分子中将含有一SO_3~-Na~+基团),使之具有聚电解质性质,並使其分子在溶液中的流体力学体积随电离基团的数目及在分子中的分布而变化。因而使淋洗曲线的位置及形状出现异常。为了克服这一难困,
First, the foreword In the former newspaper describes the use of simple GPC determination of the molecular weight distribution of polyester, this article is the continuation of the above work. Acrylic fiber (PAN copolymer) by GPC method to determine the molecular weight distribution seen little. As the acrylic macromolecules contain ionizable groups (for example, when sodium propylene sulfonate is the third monomer, the molecule will contain an SO_3 ~ -Na ~ + group), it will have polyelectrolyte properties and make it The hydrodynamic volume of a molecule in solution varies with the number of ionizing groups and its distribution in the molecule. As a result, the position and shape of the elution curve are abnormal. In order to overcome this difficulty,